VII. The Attorney General's Decision to End the Stand-off a. overview of the plan to end the standoff On April 12, 1993, the FBI presented Attorney General Janet Reno with a plan to end the standoff with the Branch Davidians. On April 17, 1993, the Attorney General gave her approval for the plan to be implemented on April 19. The stated mission of the plan was to ``secure the surrender/arrest of all adult occupants of the residence while providing the maximum possible security for the children within the compound.'' A key component of the plan was the decision to use CS, a chemical riot control agent, which would be sprayed into the Branch Davidian residence in an attempt to induce the Davidians to leave. The plan was implemented on April 19, but the Davidians did not leave their residence as government officials suggested. Instead, 6 hours after the beginning of the operations, a fire erupted inside the structure, ultimately consuming it and the more than 70 persons inside. b. the operation plan for april 19, 1993 1. Overview of the written operation plan to end the standoff As early as March 22, 1993 the FBI began formulating an operation plan to end the standoff with the Davidians.\494\ On April 12, 1993, the FBI presented its plan to the Attorney General for her approval.\495\ According to the Justice Department Report, ``Over the next several days the Attorney General and Senior Justice Department and FBI officials discussed, debated and dissected every aspect of the plan.'' \496\ --------------------------------------------------------------------------- \494\ U.S. Dept. of Justice, Report to the Attorney General on the Events at Waco, Texas 79 (1993) [hereinafter Justice Department Report]. Larry Potts, Assistant Director of the FBI in 1993, testified before the subcommittees that ``[I]n terms of the formation of the gas plan, I think that Mr. Jamar first contacted me around March 27th or sometime near the very end of March, to indicate that such a plan was being submitted [to senior FBI officials].'' Hearings Part 2 at 480. \495\ Justice Department Report at 263. \496\ Id. --------------------------------------------------------------------------- The operations plan provided that its mission was to ``secure the surrender/arrest of all adult occupants of the residence while providing the maximum possible security for the children within the compound.'' The key component of the plan was the delivery of a chemical riot control agent, known as CS, into the Branch Davidian residence in order to induce the Davidians to leave. While the CS agent was being inserted, FBI officials planned to use a loud speaker system and the telephone to advise the Davidians that tear gas was being inserted into the residence to force them to leave, but that an attack was not underway. The plan also provided for a demand that all subjects leave the building and surrender to authorities.\497\ --------------------------------------------------------------------------- \497\ Federal Bureau of Investigation, Briefing for the Attorney General, at 25. [See Documents produced to the subcommittees by the Department of Justice 003370-003480, at Appendix [hereinafter Justice Documents]. The Appendix is published separately.] --------------------------------------------------------------------------- The plan provided for the operation to last up to 48 hours or until all subjects had exited the residence and surrendered. The plan provided for the first insertion of CS agent to be made into the front/left portion of the residence. After a period of time, which was to be dependent on the Davidians' response to the initial delivery of the CS agent and any subsequent negotiations that were possible, an additional tear gas delivery was to be made into the back/right portion of the residence. After a third delivery of CS, into an area not specified in the plan, all subsequent deliveries of CS agent were to be made into the upper and lower windows of the residence.\498\ --------------------------------------------------------------------------- \498\ Id. --------------------------------------------------------------------------- During the first three insertions, the CS agent was to be delivered into the residence by two combat engineering vehicles (CEV's), an armored vehicle similar to the Bradley Fighting Vehicle (Bradley), but which is unarmed. The CEV's at Waco were mounted with boom-like arms which were capable of penetrating the walls of the structure. Mounted on the arms of the CEV's were mechanical devices designed to spray a stream of CS agent into the holes made by the booms. After the third insertions of CS agent, the operations plan called for agents located in unarmed Bradley Fighting Vehicles to maneuver close enough to the residence so that they could fire Ferret round projectiles through the windows of the structure. These small non-explosive grenade-like projectiles contained CS agent which would rise into the air when the projectile broke open upon impact. The use of Ferret rounds was to be in addition to continuing insertions of CS by agents in the CEV's. The plan also provided for specific assignments for the different HRT and SWAT teams involved in the operation. It specified the maneuvers to be made by the two CEV's, the nine Bradley Fighting Vehicles, and the M-88 tank retrieval vehicle, and provided for miscellaneous administrative and logistical issues such as types of uniforms to be used and the appropriate manner for handling prisoners. Additionally, the plan provided to the Attorney General on April 12, 1993 included details concerning where the FBI's snipers were to be positioned and the positioning and capabilities of SWAT team members. The plan contained a ``medical annex'' providing for a means to treat ``the potentially large number of casualties which could exceed the current medical capabilities of any single agency present'' as well as procedures to be followed to arrest persons who had been exposed to CS. The annex also provided for locations where the injured were to be treated, provided a list of local and secondary hospitals (including address, latitude/longitude location, and estimated air travel time). And the medical annex provided instructions to the agents on the procedure to handle a mass surrender by the Davidians. Finally, the plan provided for the possibility that the Davidians might not surrender. The final contingency provision in the plan stated that ``if all subjects failed to surrender after 48 hours of tear gas, then a CEV with a modified blade will commence a systematic opening up/ disassembly of the structure until all subjects are located.'' 2. Acceleration provisions of the operations plan While the operations plan called for the government's actions to end the standoff to unfold over a period of 2 days, the plan also contained contingency provisions that allowed for a departure from the concept of a methodical insertion of CS. One of these provisions was implemented on April 19 and resulted in a rapid acceleration of the insertion of CS agent. The first of the two contingency provisions in the plan provided that if the Davidians were observed in the tower during the operations, after having been informed not to be there, agents were permitted to insert CS gas into the tower by firing Ferret round projectiles into the tower. More importantly, however, the second contingency provision in the plan provided: If during any tear gas delivery operations, subjects open fire with a weapon, then the FBI rules of engagement will apply and appropriate deadly force will be used. Additionally, tear gas will immediately be inserted into all windows of the compound utilizing the four Bradley Vehicles as well as the CEV's.\499\ --------------------------------------------------------------------------- \499\ Id. --------------------------------------------------------------------------- c. the way the plan actually unfolded At approximately 5:55 a.m., Dick Rogers, commander of the FBI's Hostage Rescue Team, ordered the two CEV's, which were to insert the CS riot control agent, deployed to the compound. At 5:56 a.m., the FBI's chief day-to-day negotiator, Byron Sage, telephoned the residence and asked to speak with Davidian Steve Schneider. It took approximately 3 minutes for someone to come to the phone.\500\ At 5:59 a.m., Sage informed the person answering the telephone that ``We are in the process of putting tear gas into the building. This is not an assault. We will not enter the building.'' The person on the other end of the telephone responded ``You are going to spray tear gas into the building?'' whereupon Sage replied, ``In the building . . . no, we are not entering the building.'' \501\ While the Justice Department Report is ambiguous on the person to whom Sage was speaking, Sage testified at the hearings before the subcommittees that the person he talked with was Schneider.\502\ At the conclusion of this conversation, someone threw the telephone outside of the building.\503\ --------------------------------------------------------------------------- \500\ Justice Department Report at 285. \501\ Justice Department Report at 286. \502\ Hearings Part 3 at 269. \503\ Justice Department Report at 286. --------------------------------------------------------------------------- From 6 a.m. to approximately noon on April 19, 1993, FBI agents implemented the operations plan and injected a large quantity of CS riot control agent into the Branch Davidian residence in four distinct phases. The agents moved close to the Davidian residence in CEV's equipped with devices \504\ which could shoot a horizontal stream of CS agent in short bursts or continuously for up to 15 seconds.\505\ The device uses carbon dioxide as a disbursant to propel a stream of CS agent, suspended in methylene chloride, horizontally into the air. Once the CS stream is fired, the carbon dioxide quickly evaporates and the methylene chloride gas disperses the CS evenly through a room, until the methylene chloride itself evaporates. The CS agent, which is a fine powder, then slowly falls to the floor, where it remains. The capacity of each delivery system on the CEV's was 30 grams of CS agent. --------------------------------------------------------------------------- \504\ The delivery systems mounted on the CEV's were Protecto-jet Model 5 Tear Gas Delivery Systems manufactured by ISPRA, Ltd., an Israeli company. The systems were sold to the FBI by Advanced Materials Laboratories, Inc. of Forrest Hills, NY. The Justice Department Report refers to the systems as Mark V systems. See Justice Department Report at 287. The subcommittees investigation indicates that while the Mark V system does exist, there is no evidence that it was used at Waco. The evidence indicates that only the Protecto-jet Model 5 system was mounted on the CEV's furnished to the FBI by the Defense Department. The references to the Mark V system in the Justice Department Report appear to be in error. \505\ The Protecto-jet Model 5 system consists of a cylinder approximately 27 inches long, 4\1/8\ inches in diameter, weighing approximately 16 lbs., which is connected to a hose with a nozzle. The device uses carbon dioxide to propel a chemical agent, such as CS, mixed in a suspension of methylene chloride, into the air. The range of the device is 15-20 yards in still air. The device can be used to shoot 13- 17 1-second bursts or a continuous burst for up to 15 seconds. --------------------------------------------------------------------------- The insertion of CS agent into the Branch Davidian residence was performed in four phases. The first two phases employed two CEV's. On one CEV was mounted two CS delivery systems, while four systems were mounted on the second CEV. The CEV's were operated in tandem, each inserting the entire contents of the six CS agent delivery systems during the first two phases of the operation, at 6 a.m. and again at approximately 8 a.m. In each of the first two phases, a total of 180 grams of CS was delivered. The third and fourth phases, also 2 hours apart, involved only one CEV, as the second CEV had experienced mechanical difficulties and no longer operated. Four cylinders of CS were delivered in each of these two phases, for a total 120 grams of CS inserted into the residence. Thus, over the entire 6 hours of the operation, a total of 600 grams of CS agent was inserted into the Branch Davidian residence. During the standoff with the Davidians, FBI agents used unarmed Bradley Fighting Vehicles as a means of transportation while guarding the perimeter of the residence. The FBI's overall operational plan for April 19 provided for the Bradleys to be used in a contingency plan to be implemented in the event the Davidians began to fire on the CEV's. If that occurred, agents in Bradleys who had maneuvered close to the building and were standing ready were to insert additional quantities of CS agent into all parts of the building. Agents in the Bradleys were to fire Ferret round projectiles into the residence. Ferret rounds \506\ resemble large plastic bullets, and are fired from hand-held grenade launchers. Each projectile carries 3.7 grams of CS agent, mixed in a suspension of methylene chloride. --------------------------------------------------------------------------- \506\ Ferret Rounds are 37, 38, and 40 millimeter projectiles which can be fired from hand-held grenade launchers. Each projectile carries 3.7 grams of CS riot control agent, mixed in a suspension of methylene chloride. --------------------------------------------------------------------------- Once the Davidians began firing on the CEV's Rogers gave the order to implement the contingency plan. The agents in the Bradleys then maneuvered close to the Branch Davidian residence and began to fire the Ferret round projectiles through the windows of the building. During the 6-hour operation, 400 Ferret round projectiles were fired at the Branch Davidian residence, a number of projectiles struck the side of the building and did not enter the building. Estimates of the number of projectiles that actually entered the residence range from 300 to 380. Had all 400 projectiles fired at the residence actually entered the residence, however, the total quantity of CS agent delivered by the Ferret round projectiles would have been 1,480 grams. d. overview of the use of cs chemical agent 1. Introduction Chlorobenzylidene malononitrile, commonly called CS, is one of a family of approximately 15 chemical compounds used to control civilian populations during periods of disturbance and unrest. These ``riot- control agents'' cause acute irritation to the eyes, mouth, nose, and upper respiratory tract, that is relatively brief and not usually accompanied by permanent toxic effects. Exposure to riot-control agents renders the victim temporarily incapacitated, but the symptoms typically persist for only a few minutes after cessation of exposure.\507\ --------------------------------------------------------------------------- \507\ F.W. Beswick, Chemical Agents Used in Riot-Control and Warfare, 2 Hum. Toxicology 247-256. --------------------------------------------------------------------------- The first riot control agent was developed in the early 1900's.\508\ In 1928, two chemists, Corson and Stoughton, developed 2- chlorobenzylidene malononitrile, code named CS. However, CS was not developed as riot-control agent until the 1950's, when the British War Office began to search for a chemical that was more potent than either CA or CN.\509\ By the 1960's, CS had replaced CN as the preferred tear gas among police authorities around the world. Its popularity stemmed from the fact that it was shown to be a more potent irritant than CN, and appeared to cause less long-term injury, particularly to the eye.\510\ Military forces also saw CS as a potent weapon for particular operations. Large quantities of CS were used by the United States during the Vietnam War. CN is no longer used by the U.S. military operations, but it is still used by some civil authorities, and by individuals for self-defense. Among civilian law enforcement agencies CS is, by far, the most widely-used riot control agent. --------------------------------------------------------------------------- \508\ The first riot-control agent may have been ethyl bromacetate, which was used by the Paris police in a hand grenade to disable criminal gangs. The German chemical industry that produced many lethal chemical weapons during World War I (e.g., nerve gases) also developed new tear gases. For example, xylyl bromide was packed in 150-mm artillery shells and used during the battle against the Russians at Bolimow in January 1915. This early military use of a tear gas was not judged to be a success, owing to the failure of the chemical to vaporize in the sub- zero temperatures on the battlefield. However, it provided an early indication of the importance of weather conditions to the effectiveness of these agents. By 1918, the French had developed bromobenzylcyanide, known by the military code CA, and the British and Americans had developed chloroacetophenone, known by the military code CN, which became the most effective and widely used tear gas. In the postwar period, the urban crime wave and emergence of gangsters in the 1920's in the United States spurred renewed efforts to develop riot-control agents. By the mid-1920's, small explosive cartridges containing CN were available over the counter for personal protection. CN rapidly became the tear gas of choice for law-enforcement authorities. Howard Hu, Toxicodynamics of Riot-Control Agents (Lacriminators) 271, 273 in Chemical Warfare Agents (Satu M. Somani ed., 1992). \509\ J. Cookson and J. Nottingham, A Survey of Chemical and Biological Warfare (1969). \510\ Hu, supra note 508. --------------------------------------------------------------------------- 2. Concerns over use of CS CS has gained wide acceptance as a means of controlling and subduing riotous crowds. However, its widespread use has raised questions about its safety. Most published studies have concluded that, if used correctly, the irritant effects of exposure are short-lived and do not cause permanent damage.\511\ However, there have been isolated reports of fatalities from the use of riot control agents. The most common reports involve deaths attributed to the use of riot control agents by American miltary personnel in Vietnam.\512\ Additionally, other reports involve injury and death from the use of CS in Chile, Panama, South Korea, and the Gaza Strip and West Bank of Israel.\513\ It has been unclear from these reports, however, whether the riot control agent used was CS or another, more toxic, agent.\514\ Of particular concern, however, has been the indiscriminate use of riot control agents in enclosed and indoor spaces where it is feared that resulting high concentrations may have resulted in harmful levels of exposure. Severe injuries from exploding tear gas grenades as well as deaths from the toxicity of riot control agents used in confined, indoor spaces have been reported. --------------------------------------------------------------------------- \511\ The most thorough study of the use of CS agent against humans is the Himsworth Report, which investigated the use of CS agent in Northern Ireland in 1969. It concluded that exposure to CS did not produce long-term injury or death in humans. Home Office, report of the enquiry into the Medical and Toxicological aspects of CS (Ortho- chlorobenzylidene malononitrile), Part II: Inquiry into Toxicological Aspects of CS and its use for Civil Purposes (1971) [hereinafter Himsworth Report]. A recent study of the use of CS on 1,500 persons in a confined area space made the same findings. P.J. Anderson et al., Acute effects of the potent lacrimator o-chlorobenzylidene malonitrile (CS) tear gas, 15 Hum. & Experimental Toxicology 461, 464-465 (1996). \512\ The United States used large amounts of CS during the Vietnam War in both offensive and defensive military operations. The basic doctrine for the use of CS weapons by U.S. sources is summarized in the following passage taken from a 1969 Army training circular: The employment of riot-control agents (CS, CN) in Counter guerilla operations is most feasible in tactical situations characterized by close combat in which rapidly responding systems are essential and permanent effects are undesirable. Riot-control munitions can be used tactically to temporarily disable hostile troops, to suppress their fire, or to cause them to abandon their position. Offensively, riot- control agents can be used to ``flush out'' unprotected enemy troops from concealed positions or to reduce their ability to maneuver or use their weapons. Defensively, riot-control munitions can be integrated into defensive perimeters to provide rapid CS delivery in case of enemy attack. CS was employed for defensive purposes such as in the event of a surprise attack from superior enemy forces, and to help secure helicopter extractions of combat units or downed airman. It was used extensively in area-denial operations to render terrain uninhabitable by the enemy. CS was also used routinely in direct engagement of the enemy during offensive combat operations. U.S. forces were issued gas masks to protect themselves against use of CS and other tear gases by the enemy. According to one U.S. evaluation, the North Vietnamese had only a limited supply of tear gas, but they used it to good effect. During the conflict, the general service respirator was replaced by a lighter mask, which went through a number of further modifications. The protection which it conferred was adequate but not complete, because dense CS aerosols can have a strong irritant effect on bare skin, especially in hot and humid conditions when the skin is moist. \513\ See generally, H. Jack Geiger & Robert M. Cook-Deegan, The Role of Physicians in Conflicts and Humanitarian Crises, Case Studies from the Field Missions of Physicians for Human Rights, 1988 to 1993, 270 JAMA 616 (1993). \514\ In a 1989 report, the General Accounting Office noted that the group Physicians for Human Rights had conducted a fact-finding trip to investigate allegations of deaths from the use of CS in the occupied territories but that the members of the group could not confirm that any of the reported deaths were attributable to tear gas inhalation. See e.g., U.S. General Accounting Office, Isreal: Use of U.S.--Manufactured Tear Gas in the Occupied Territories 3 (1989) (citing Physicians for Human Rights, ``The Casualties of Conflict: Medical Care and Human Rights in the West Bank and Gaza Strip,'' Report of a Medical Fact Finding Mission by Physicians for Human Rights (1988)). The GAO report also noted that while Amnesty International had reported concerns over a ``pattern of death [that] appeared to follow expose to high concentrations of tear gas'' they also stated that ``Amnesty International noted that it was in no position to verify the exact cause of death in every case.'' Id. at 4. --------------------------------------------------------------------------- Critics of the use of these agents argue that the available toxicological data is insufficient to describe with any confidence the potential for long-term pulmonary, carcinogenic, and reproductive effects. One recently published review of the toxicological data on riot control agents concluded that relatively little has been published in the mainstream medical literature and that epidemiologic studies following tear gas use under actual field conditions are almost nonexistent. The author of this review wrote: There is clearly a great need for openly conducted research illuminating the full health consequences of exposure to riot- control agents including outcomes such as tumor formation, reproductive effects, and pulmonary disease. Consideration must be given to the possible effects of these agents on the young, the elderly, and other persons who might have increased susceptibility.\515\ --------------------------------------------------------------------------- \515\ Hu, supra note 508, at 284-285. --------------------------------------------------------------------------- e. clinical effects and toxicity of cs 1. Common effects of exposure to CS All riot control agents, including CS, produce intense sensory irritation even in the most minute concentrations. For most of these agents, the eye is the most sensitive organ, with pain arising rapidly, accompanied by conjunctivitis, excessive tearing, and uncontrolled blinking. The inside of the mouth and nose experience a stinging or burning sensation, and there is usually excessive discharge of nasal mucus. Chest tightness and burning are accompanied by coughing, sneezing, and increased secretions from the respiratory passageways. A burning sensation is felt on the skin, often followed by inflammation and redness, and in some cases, actual burning of the skin occurs. Tear gas exposure may also irritate the stomach, leading to vomiting and possibly diarrhea. In addition to the physical symptoms, panic and severe agitation are common among those individuals with no prior experience of exposure to tear gas.\516\ --------------------------------------------------------------------------- \516\ See generally Id. at 276; Anderson, supra note 511, at 461. --------------------------------------------------------------------------- Most of the symptoms are felt within 10 to 30 seconds after exposure to the agent. After cessation of exposure, however, most symptoms continue to persist for a period of minutes before subsiding and disappearing.\517\ The effects of expose vary among individuals. Additionally, weather conditions, such as temperature and humidity, can heighten the potency of these agents.\518\ --------------------------------------------------------------------------- \517\ Hu, supra note 508, at 276. \518\ Id. at 277. --------------------------------------------------------------------------- 2. Toxicity of CS A review of the scientific literature concerning the use of CS indicates that limited conclusions as to the toxicity and lethality of CS are known. It seems generally accepted by the scientific community that the concentration of CS agent which is noticeable by humans and which will provoke physical responses in humans is 4 milligrams per cubic meter (4 mg/m\3\).\519\ While no studies on humans have been conducted concerning the lethality of CS, several studies have projected the concentrations at which CS is lethal to humans from the effects of studies performed on animals. Those studies estimate that the concentration of CS agent which would prove lethal to 50 percent of any given human population ranges from as low as 25,000 \520\ to as high as 150,000 mg-min/m\3\.\521\ Recent estimates by the U.S. military, however, estimate that the lethal concentration for humans is 61,000 mg- min/m\3\.\522\ That study projects that the concentrations which would be injurious to the health of approximately 50 percent of any human population range from between 10-20 mg-min/m\3\.\523\ --------------------------------------------------------------------------- \519\ Bryan Ballantyne, Riot Control Agents, Biomedical and Health Aspects of the Use of Chemicals in Civil Disturbances 27 (1977); Hu, supra note 508, at 279. \520\ Dow Chemical Co., Material Data Safety Sheet (1988); Ballantyne, supra note 519. \521\ Id. \522\ Headquarters, Departments of the Army, Navy, and the Air Force, Potential Military Chemical/Biological Agents and Compounds 59 (1989). \523\ Id. --------------------------------------------------------------------------- It is important to note, however, that there are no published studies which find that any human death has been caused by exposure to CS agent. While a number of unverified reports of human deaths can be found in the literature, in all of these reports it is unclear precisely whether CS or some other, more toxic, riot control agent was used or whether some other circumstance could have caused the deaths. The most extensive study of the use of CS agent on humans, by United Kingdom forces in Northern Ireland in the late 1960's, found that no deaths (and no long-term injuries) resulted from the widespread use of CS agent there.\524\ The only other documented study of the effects of CS used on a large number of humans confirms this finding.\525\ --------------------------------------------------------------------------- \524\ Himsworth Report, supra note 511, at 23-25. \525\ Anderson, supra note 511, at 464-465. --------------------------------------------------------------------------- Some people may find curious the fact that all of these studies (and similar studies on the effects of chemical agents) uniformly give estimates of the level at which CS is lethal or injurious to 50 percent of a given population of humans. It appears from the literature that the effect of CS on humans (and on other animals) is not ``linear,'' i.e., that proportionately greater concentrations do not have equally proportionate increases in effect. While scientists can estimate the levels which would prove lethal to 50 percent of a given population, it would be incorrect to presume that half of that quantity would kill 25 percent of that population. In fact, the most well-known study of the effects of CS on humans estimates that the likelihood of death after exposure to a dose of CS that is one-tenth the estimated lethal does is less than 1 in 100,000.\526\ Accordingly, any analysis of the lethality of the CS agent used in the concentrations that resulted on April 19 can only be performed in light of the 50 percent lethality estimates. --------------------------------------------------------------------------- \526\ Himsworth Report, supra note 511, at 55-56; Ballantyne, supra note 519, at 30. --------------------------------------------------------------------------- Even when the quantities of CS riot control agent used do not reach lethal toxic levels, there are, nevertheless, significant physical consequences that occur from exposure to CS, and often severe emotional reactions caused by the symptoms brought on from exposure to CS. As discussed above, one recent study of the use of large quantities of CS against a population unable to leave the area in which the CS was used indicated that first, second, and even third degree burns are possible when skin is exposed to CS.\527\ Additionally, some studies have shown that exposure to CS can cause allergic contact dermatitis.\528\ Other studies have shown that when CS can cause severe gastroenteritis when ingested, whether directly or as a result of ingesting mucus secretions containing CS from oral inhalation.\529\ --------------------------------------------------------------------------- \527\ Anderson, supra note 511, at 463-464. \528\ Hu, supra note 508, at 280. \529\ Id. --------------------------------------------------------------------------- Additionally, some studies on animals have suggested that exposure to CS might cause cancer and genetic abnormalities.\530\ Some studies have stated that exposure to high concentrations of CS for prolong periods could result in inflammatory changes in the respiratory tract that might be conducive to secondary respiratory infection.\531\ And it is believed that CS may exacerbate existing medical conditions of persons with bronchitis or asthma, although no reports of death from these conditions exist. --------------------------------------------------------------------------- \530\ Id. \531\ Ballantyne, supra note 519, at 30. --------------------------------------------------------------------------- f. effect of the cs and methylene chloride in the quantities used on april 19th 1. Lethality of CS as used at Waco Testimony before the subcommittees presented contradictory evidence on the effects of CS riot control agent. The published literature described above, however, is more consistent in the conclusions drawn. While it cannot be concluded with certainty, it is unlikely that the CS riot control agent, in the quantities used by the FBI, reached lethal toxic levels. The evidence presented to the subcommittees does indicate, however, that CS insertion into the enclosed bunker at a time when women and children were assembled inside that enclosed space could have been a proximate cause of or directly resulted in some or all of the deaths attributed to asphyxiation in the autopsy reports. In order to answer the question of whether the quantities of CS agent inserted into the residence might have reached lethal levels, the subcommittees attempted to determine the concentrations that were present in the residence under the ``worst-case'' circumstances. To make this determination, a number of assumptions must be made. Many of these assumptions were overstated solely for the purpose of calculation in order to place the greatest scrutiny on the government's actions. In each of the first two phases of insertion into the Branch Davidian residence, a total of 180 grams (180,000 mgs) of CS was delivered.\532\ For the purposes of analysis, the subcommittees assumed an ``extreme case'' scenario, where all 180 grams were delivered into the building by the two CEV's at the same instant, and that one-quarter of the Ferret rounds fired at the residence were fired at the precise moment that the CS delivered by the CEV's entered the residence.\533\ If so, then during the first and second phases of the CS operation, 550 grams (550,000 mgs) of CS were delivered to the residence.\534\ During the first and second phases, therefore, the total concentration of CS delivered into the compound was 108.92 mgs/m\3\.\535\ During the third and fourth phases, due to the mechanical failure of the second CEV, only 490 grams (490,000 mgs) of CS agent was delivered into the residence.\536\ During each of the third and fourth phases the total concentration at the (assumed) moment of insertion was 97.04 mgs/ m\3\.\537\ --------------------------------------------------------------------------- \532\ CEV-1 emptied its four 30-gram cylinders while CEV-2 emptied the contents of its two 30-gram cylinders. The total delivered was thus (4 x 30) + (2 x 30) = 180 grams. \533\ Each Ferret round carried 3.7 grams of CS agent. A total of 400 Ferret rounds were fired at the residence. Thus, the total quantity of CS agent in one quarter of the Ferret rounds used was 370 grams (3.7 x 100). \534\ On each of the first two phases, 180 grams of CS agent was delivered by the CEV's and approximately 370 grams was delivered by Ferret Rounds. This totals 550 grams, or 550,000 milligrams. \535\ The Branch Davidian residence contained approximately 178,310 cubic feet of living area. Converted into meters, the volume of the residence was 5,049.7 cubic meters. The concentration inside the building, therefore, was 108.92 mgs/m\3\ (550,000 mgs/5,049.7m\3\ = 108.92 mgs/m\3\). \536\ The 180 grams from CEV-1 and the approximately 370 grams from 100 of the Ferret Rounds totals 490 grams, or 490,000 milligrams. \537\ 490,000 mgs/5049.7 m\3\ = 97.04 mgs/m\3\. --------------------------------------------------------------------------- Assuming the Branch Davidian residence been air-tight, so that none of the CS agent escaped the building (which was not the case), the total amount of CS agent delivered present in the building would have been 411.92 mgs/m\3\.\538\ This concentration is far below the 61,000 mgs/ m\3\ amount projected to be lethal to 50 percent of a given population of humans. Stated in another way, it would take a concentration of CS 148 times greater than the greatest amount that could have been present at the Branch Davidian residence on April 19 to reach that lethal level. --------------------------------------------------------------------------- \538\ The concentration inside the building, therefore, was 108.92 mgs/m\3\ + 108.92 mgs/m\3\ + 97.04 mgs/m\3\ + 97.04 mgs/m\3\ = 411.92 mgs/m\3\). --------------------------------------------------------------------------- In reality, the concentrations of CS inside the Branch Davidian residence did not reach even these levels. The Branch Davidian residence was a poorly constructed structure which allowed for air to move in and out of the residence continuously. The air circulation carried some of the CS agent out of the building. Adding to the air circulation inside the Davidians residence that day was the fact that the FBI began to use the CEV's to ram openings into the building, ostensibly to create a means of escape for the Davidians and, later, to ``deconstruct'' portions of the structure in an effort to prevent the Davidians from occupying those areas of the residence. These actions greatly enhanced the circulation into the residence and further depleted the concentration of CS agent inside the residence. Additionally, on April 19th, the winds were gusting up to 25 mph.\539\ This fact greatly enhanced the air circulation inside the residence, adding to the dissipation of the concentration of CS agent in the residence. Thus, the actual levels of CS inside the Davidian residence were less than those calculated above. --------------------------------------------------------------------------- \539\ The National Oceanic and Atmospheric Administration recorded high winds beginning at noon on April 18, 1993. The winds continued through April 19. At 11:52 a.m. on April 19, winds were recorded at 25 mph with gusts to 30 mph. --------------------------------------------------------------------------- Some who have contacted the subcommittees have suggested that the above analysis is flawed because it does not allow for the possibility that some CS agent was concentrated in certain areas of the residence rather than being evenly distributed throughout the entire structure. The subcommittees believe that it is important to address that possibility. Because the largest group of bodies recovered after the fire was found in the area of the residence commonly known as the gun room or bunker \540\ consideration was given to the concentrations of CS in that area.\541\ The bunker was a solid concrete room inside the Davidian residence. It had no windows or other access to the outside of the building, but did open into a hallway inside the residence. It appears that there was little opportunity for CS to have been directly sprayed into the bunker and that any CS that was present in the bunker likely drifted into that room after it was sprayed into one or more of the rooms along the outside of the structure. The subcommittees note, however, that the videotape of the insertion of CS on April 19 indicates that one of the CEV's drove into the structure near the bunker during the fourth phase of the CS insertion. If the door to the bunker had been open at that time, it is possible that CS might have been injected directly into the bunker. --------------------------------------------------------------------------- \540\ See Justice Documents at the Appendix for a diagram of the floorplan of the Branch Davidian residence. \541\ It should be noted, however, that none of the autopsies of the persons found in the bunker indicate the cause of death was from exposure to CS. --------------------------------------------------------------------------- Based on this possibility the subcommittees attempted to determine, as a worst case scenario, the concentration of CS that would have been present in that room had the CEV emptied the entire contents of one of its CS containers into the bunker. It appears, however, that even in that event the concentration of CS would not have reached lethal levels. The volume of the bunker room was approximately 44.40 cubic meters. Assuming that an entire cylinder (30 grams) of CS was injected into the room, the concentration at that moment would have been 675.67 mgs/ m\3\.\542\ As discussed above, the concentration level estimated to be lethal to humans is 61,000 mgs-min/m\3\. Even had the CEV which was mounted with four containers of CS inserted the contents of all four containers into the bunker, the resulting concentration would have been 2,702.70 mgs/m\3\.\543\ Again, this figure is well below the concentration level estimated to be lethal to humans. --------------------------------------------------------------------------- \542\ Each cylinder of CS contained 30 grams, or 30,000 milligrams, of CS. 30,000 mgs/44.40 m\3\ = 675.67 mgs/m\3\. \543\ 120,000 mgs/44.4 m\3\ = 2,702.70 mgs/m\3\. --------------------------------------------------------------------------- Another worse case scenario considered by the subcommittees was the possibility that one of the CEV's might have delivered the entire contents of one of its cylinders of CS agent into one of the smallest rooms of the residence, and that that room was inhabited at the time. It still appears that the concentration of CS would not have reached lethal levels. The smallest rooms in the structure were the women's quarters located on the second floor of the residence. The smallest of these had a total volume of 16.17 cubic meters. Assuming that an entire cylinder of CS had been injected into this room, the concentration at that moment would have been 1855.29 mgs/m\3\.\544\ Assuming further that a number of Ferret rounds also happened to be fired into the room at the exact moment that the CS was injected by the CEV (assume an impossible event such as 20 rounds entering the room at the same instant), the concentration at that instant would have been 6,431.66 mgs/m\3\.\545\ Again, these figures fall far below the concentrations estimated to be lethal to humans. --------------------------------------------------------------------------- \544\ Each cylinder of CS agent contained 30 grams, or 30,000 milligrams. 30,000 mgs/16.17 m\3\ = 185.52 mgs/m\3\. \545\ 30 grams of CS agent from a CEV plus 74 grams of CS agent from 20 Ferret rounds is a total of 104 grams (30 + (3.7 x 20) = 104), or 104,000 milligrams. 104,000 mgs/16.17 m\3\ = 6,431.66 mgs/m\3\. --------------------------------------------------------------------------- While concluding that it is unlikely that the CS reached toxic levels, the subcommittees note the level of exposure to CS experienced by an individual Davidian cannot be determined. It is possible that a person near one of the CEV's injecting the CS may have been subject to a level of CS that was high enough to cause death. Additionally, 10 of the autopsies indicate asphyxiation as the cause of death, but do not indicate whether CS or other factors may have lead to this. The subcommittees are unable to conclude that CS did not play a part in the deaths of these persons. 2. Lethality of methylene chloride used with CS at Waco During the gassing operation, each cylinder of the CS riot control agent introduced into the Branch Davidian residence by the CEV's was mixed with approximately 1,070 grams of methylene chloride. This suspension was then dispersed into the structure by carbon dioxide, which almost immediately evaporated, leaving the suspension of CS and methylene chloride. Additionally, each of the Ferret round projectiles contained 33 grams of methylene chloride as the dispersant medium for the CS agent. The four phases of insertion of CS agent into the Branch Davidian residence were conducted approximately 2 hours apart. During the first and second phases six cylinders of CS agent were inserted into the residence, delivering approximately 6,420 grams of methylene chloride in each phase.\546\ During the third and fourth insertions only four cylinders of CS agent were inserted, accounting for approximately 4,280 grams of methylene chloride during each insertion. Assuming a worse case scenario of all of the CS insertions in one phase occurring at the same moment and approximately \1/4\ of the Ferret round projectiles entering the building at that same time, thus adding an additional 3,300 grams of methylene chloride in each phase,\547\ the total concentration of methylene chloride delivered into the building during the first and second insertions was 1,924.87 mgs/m\3\.\548\ --------------------------------------------------------------------------- \546\ Each cylinder contained 1,070 grams of methelyene chloride. Six cylinders totaled 9,720 grams. \547\ Each Ferret round contained 33 grams of methylene chloride. One hundred Ferret rounds thus inserted 3,300 grams of the chemical into the building. \548\ In the first two phases the total quantity of methylene chloride delivered was 9,720 grams ((6 x 1,070) + (100 x 33)) or 9,720,000 milligrams. Divided by the cubic footage of the building (5,049.7 m\3\) the distribution of the substance throughout the building in these phases was 1,924.87 mgs/m\3\. In the third and fourth two phases the total quantity of methylene chloride delivered was 7,580 grams ((4 x 1,070) + (100 x 33)) or 7,580,000 milligrams. Divided by the cubic footage of the building (5,049.7 m\3\) the distribution of the substance throughout the building in these phases was 1,501.08 mgs/m\3\. --------------------------------------------------------------------------- A review of the scientific literature concerning CS agent has located no estimates of the concentration of methylene chloride which would prove harmful or lethal to humans. The only estimates which do exist are with respect to mice and rats. For example, the concentration that would prove lethal to 50 percent of a rat population is estimated to be 2,640,000 mgs-min/m\3\.\549\ As can be seen from the above figures, therefore, the total concentrations of methylene chloride at the Davidian residence on that day were less than the concentrations that would prove lethal to even rats.\550\ It appears, therefore, that the methylene chloride used with the CS agent could not have caused the death of any of the Davidians. --------------------------------------------------------------------------- \549\ See generally Mallinckrodt, Inc., Material Data Safety Sheet 2 (1989); Dow Chemical, Inc., Material Data Safety Sheet 3 (1988). \550\ The total quantities from each of the four insertions of CS agent was only 5,356.74 mgs/m\3\. ((2 x 1,924.87) + (2 x 1,501.08) = 5,356.74). --------------------------------------------------------------------------- As in the case with CS, the subcommittees considered the possibility that some methylene chloride was concentrated in certain areas of the residence rather than being evenly distributed throughout the entire structure. Because the largest group of bodies recovered after the fire was found in the area of the residence commonly known as the gun room or bunker, consideration was given to the concentrations of methylene chloride in that area.\551\ As discussed above, the bunker was a solid concrete room with no windows or other access to the outside of the building, but did open into a hallway inside the residence. Again, it appears that there was little opportunity for the methylene chloride carrying the CS agent to have been directly sprayed into the bunker and that any methylene chloride that was present in the bunker likely drifted into that room after it was sprayed into one or more of the rooms along the outside of the structure. But the subcommittees again note that the videotape of the insertion of CS on April 19 indicates that one of the CEV's drove into the structure near the bunker during the fourth phase of the CS insertion. If the door to the bunker had been open at that time, it is possible that methylene chloride carrying the CS agent might have been injected directly into the bunker. --------------------------------------------------------------------------- \551\ It should be noted, however, that none of the autopsies of the persons found in the bunker indicate the cause of death was from exposure to methylene chloride. --------------------------------------------------------------------------- Based on this possibility the subcommittees attempted to determine, as a worst case scenario, the concentration of methylene chloride that would have been present in that room had the CEV emptied the entire contents of one of its CS containers into the bunker. It appears, however, that even in that event the concentration of CS would not have reached lethal levels. The volume of the bunker room was approximately 44.40 cubic meters. Assuming that an entire cylinder of CS (with 1,070 grams of methylene chloride as a disbursant) was injected into the room, the concentration at that moment would have been 24,099 mgs/m\3\.\552\ Even if the CEV that was mounted with four cylinders of CS inserted the contents of all four containers into the bunker, the resulting concentration would have been 96,396 mgs/m\3\.\553\ Both of these figures are well below the concentrations estimated to be lethal to rats.\554\ --------------------------------------------------------------------------- \552\ Each cylinder of CS contained 1,070 grams, or 1,070,000 milligrams, of methylene chloride. 1,070,000 mgs/ 44.40 m\3\ = 214,099 mgs/m\3\. \553\ 4,280,000 mgs/ 44.40 m\3\ = 96,396 mgs/m\3\. \554\ As stated, there are no studies estimating the lethal concentration levels to humans of exposure to methylene chloride. --------------------------------------------------------------------------- Another worse case scenario considered by the subcommittees was the possibility that one of the CEV's might have delivered the entire contents of one of its cylinders of CS agent into one of the smallest rooms of the residence, and that that room was inhabited at the time. It still appears that the concentration of methylene chloride would not have reached lethal levels. The smallest rooms in the structure were the women's quarters located on the second floor of the residence. The smallest of these had a total volume of 16.17 cubic meters. Assuming that an entire cylinder of CS had been injected into this room, the concentration of methylene chloride at that moment would have been 66,171.93 mgs/m\3\.\555\ Assuming further that a number of Ferret rounds also happened to be fired into the room at the exact moment that the CS was injected by the CEV (assume, for example, an event as unlikely as 20 rounds entering the room at the same instant), the concentration at that instant would have been 106,988 mgs/m\3\.\556\ Again, these figures fall far below the concentrations estimated to be lethal to rats. --------------------------------------------------------------------------- \555\ Each cylinder of CS agent contained 1,070 grams of methylene chloride, or 1,070,000 milligrams. 1,070,000 mgs/ 16.17 m\3\ = 66,171 mgs/m\3\. \556\ 1,070 grams of methylene chloride from a CEV plus 660 grams of methylene chloride from 20 Ferret rounds is a total of 1,730 grams (1,070 + (33 x 20) = 1,730), or 1,730,000 milligrams. 1,730,000 mgs/ 16.17 m\3\ = 106,988 mgs/m\3\. --------------------------------------------------------------------------- 3. Other possible effects of methylene chloride used with CS at Waco While the subcommittees conclude that the levels of methylene chloride did not reach lethal toxic levels, the subcommittees also considered whether the levels of methylene chloride may have affected the Davidians in other ways. At levels over 1,000 parts per million (ppm) anaesthetic effects begin to occur in humans.\557\ At levels above 2,300 ppm, exposure to methylene chloride may cause dizziness.\558\ --------------------------------------------------------------------------- \557\ 2 G. Clayton & F. Clayton, Patty's Industrial Hygiene and Toxicology 3449-3455 (1981); R. Stewart et al., Methylene Chloride: Development of a Biological Standard for Industrial Workers by Breath Analysis (1974). \558\ Id. --------------------------------------------------------------------------- Because methylene chloride evaporates rapidly when released into the air, the subcommittees considered separately the concentrations of methylene chloride during each of the four phases of the CS agent insertion. The levels of methylene chloride were greatest during the first two phases (because one of the CEV's was unable to inject the CS agent/methylene chloride mixture during the third and fourth phase). During the first and second phases, six cylinders of CS agent were inserted into the residence, delivering approximately 6,420 grams of methylene chloride in each phase.\559\ Assuming that all of the CS inserted by the CEV's during one phase was inserted at a single moment, and that approximately \1/4\ of the Ferret round projectiles used during the entire operation also entering the building at that same time (thus adding an additional 3,300 grams of methylene chloride in each phase \560\), and that the Davidian residence was airtight, the concentration of methylene chloride during each of the first two phases would have been 548 ppm.\561\ At this concentration, studies have shown no observable effects in humans.\562\ --------------------------------------------------------------------------- \559\ Each cylinder contained 1,070 grams of methylene chloride. Six cylinders totaled 9,720 grams. \560\ Each Ferret round contained 33 grams of methylene chloride. One hundred Ferret rounds thus inserted 3,300 grams of the chemical into the building. \561\ The molecular weight of methylene chloride gas is 85. One mole of methylene chloride gas is 24.2 liters. 9,720g MC/ 85 = 114 moles. 114 moles x 24.2 liters/mole = 2758 liters of MC. There was 5,049,700 liters of volume in the Davidian residence (5.049.7 m\3\ x 1000 liters/m\3\ = 5,049,700). Thus 2767.34/ 5,049,700 x 10\6\ = 548 ppm. \562\ U.S. Dept. Of Commerce, Agency for Toxic Substances and Disease Registry, Toxicological Profile for Methylene Chloride (1993). --------------------------------------------------------------------------- In considering the possibility that some methylene chloride was concentrated in certain areas of the residence, rather than being evenly distributed throughout the entire structure, the subcommittees found that it was possible that the levels of methylene chloride reached concentrations that might have caused levels that produced an anaesthetic effects in humans. Again, the subcommittees considered the possible concentration in the bunker, as the largest group of bodies recovered after the fire was found there. The volume of the bunker room was approximately 44.40 cubic meters. Assuming that an entire cylinder of CS (with 1,070 grams of methylene chloride as a disbursant) was injected into the room, the concentration at that moment would have been 6,861 ppm.\563\ This concentration was sufficient to induce dizziness and other anaesthetic effects in humans. --------------------------------------------------------------------------- \563\ 1,070 g MC/ 85 = 12.59 moles. 12.59 moles x 24.2 liters/mole = 304.63 liters of MC. There was 44,400 liters of volume in the bunker (44.40 m\3\ x 1000 liters/m\3\ = 44,400). Thus 304.63/ 44,400 x 10\6\ = 6,861 ppm. --------------------------------------------------------------------------- As stated, however, the evidence is not determinative as to whether one of the CEV's did, in fact, insert CS directly into the bunker. Additionally, it is unknown if the bunker door was open or closed, a factor that would have significantly affected the concentration levels inside the room. Finally, the air circulation inside the building would have affected the levels of methylene chloride present at any one time. The subcommittees conclude, however, that it is possible that the levels of methylene chloride in the bunker were such that the chemical impaired the Davidians' ability to escape the room. Additionally, the possibility cannot be dismissed that other Davidians, in other areas of the residence, might have been similarly adversely affected if they were directly exposed to an insertion of an entire cylinder of the CS agent/ methylene chloride mixture. Thus, the levels of methylene chloride that were present in the Davidian residence as a result of the use of the CS riot control agent might have impaired the ability of some of the Davidians to be able to leave the residence had they otherwise wished to do so. g. analysis of the attorney general's decision to end the standoff on april 19, 1993 1. The decision not to storm the residence The subcommittees received testimony concerning the FBI's decision not to storm the residence in order to end the standoff. Additionally, the Justice Department Report on these events also discusses the factors that went into this decision. According to that report, FBI tactical experts believed that there was a substantial likelihood of significant casualties to FBI agents if a frontal assault on the residence was attempted. The FBI believed that the Davidians had fortified the residence and were ready to offer resistance equal to or perhaps even greater than that they had showed during the failed February 28 assault on the residence by the ATF. The FBI was also concerned about the possibility of suicide by the Davidians in the event of such an assault.\564\ --------------------------------------------------------------------------- \564\ Justice Department Report at 259. --------------------------------------------------------------------------- Experts on tactics testified before the subcommittees that a frontal assault is one of the riskiest types of tactical operations.\565\ That risk was even greater in this situation given the large size of the structure and the wide-open areas around the structure with the resulting lack of cover for any approach to the residence. --------------------------------------------------------------------------- \565\ Hearings Part 2 at 315, 318 (statement of Donald A. Bassett). --------------------------------------------------------------------------- The FBI's decision to pursue options other than a frontal assault in order to end the standoff was a wise one. It seems clear that a raid, even one better planned than that of the ATF of February 28, was of unacceptably high risk. It is likely that FBI agents would have sustained casualties in such an assault. Any assault on the Branch Davidian residence also risked the lives of the Davidians. Additionally, the FBI appropriately considered the possibility of suicide by the Davidians in the event of an assault. 2. The reasons asserted for ending the standoff on day 51 a. The situation would not soon be resolved One of the key factors influencing the FBI's decision to recommend to the Attorney General that the standoff be ended on day 51 was the belief by FBI officials that continuing to negotiate with the Davidians would not lead to their peaceful surrender. At the hearings held by the subcommittees, FBI chief negotiator Byron Sage testified that he believed that further negotiations would not be fruitful.\566\ Tactical commander Jeffrey Jamar testified that he was skeptical that negotiations would end the stand-off, and that he became even more skeptical after Koresh reneged on a promise to come out on March 2.\567\ Documentary evidence reviewed by the subcommittees indicated, however, that some of the FBI's behavioral experts believed that there were further steps that could be taken through negotiations. Additionally, at the subcommittees' hearings, testimony was received from the attorneys for the Davidians that they believed further negotiations could have led to the Davidians' peaceful surrender.\568\ --------------------------------------------------------------------------- \566\ ``I never abandoned the concept or the hope that negotiations could successfully and peacefully resolve this matter. My statement to [Hubbell] at the time . . . was that I felt that negotiations were at an impasse . . . .'' Hearings Part 2 at 345 (statement of Byron Sage). \567\ Hearings Part 2 at 306-307. \568\ See section VI E of this report. --------------------------------------------------------------------------- Sage's view was that Koresh had broken many of the promises he had made throughout the standoff. After a experiencing a number of these broken promises, Sage and the other FBI commanders believed that they could not rely on Koresh's assurances. Another factor that may have affected the FBI commanders' view of the situation, but which was given little emphasis in the Justice Department Report, is mental and emotional fatigue affecting the FBI decisionmakers. Sage was one of the first FBI agents on the scene on February 28. He worked every day, all day, of the 51 day standoff, and only returned to his home in Austin for a short period of time on 1 day to gather more clothes. Jamar and the other senior FBI commanders were also on site for almost the entire time of the standoff. It seems only natural then, that physical and mental fatigue would begin to set in and that dealing with Koresh's rhetoric and disingenuousness would lead to emotional fatigue as well. Indeed, the Justice Department Report indicates that the law enforcement personnel present were tired and that their ``tempers were fraying.'' \569\ --------------------------------------------------------------------------- \569\ Justice Department Report at 271. --------------------------------------------------------------------------- Nevertheless, FBI commanders to become firmly convinced that nothing more would come from further negotiations with Koresh. That belief was communicated by Sage to Associate Attorney General Webster Hubbell during a 2-hour telephone conversation on April 15.\570\ This belief played a crucial role in influencing Attorney General Reno's decision to end the standoff on April 19.\571\ --------------------------------------------------------------------------- \570\ Id. at 270. \571\ Id. --------------------------------------------------------------------------- During the hearings, however, the subcommittees received testimony from the Davidians' attorneys that Koresh was hard at work writing his interpretation of the Seven Seals discussed in the Book of Revelation in the Bible. They believe that Koresh was willing to surrender when he finished his writing. The FBI's commanders knew of Koresh's desire to write this manuscript but did not believe he was actually working on it. It appears that fatigue and frustration at the lack of achieving success in obtaining the release of additional Davidians may have led the negotiators to be less than receptive to this information. That the negotiators were not open to this new information, and did not pass it on to their superiors, played a part in the Attorney General's decision to end the standoff on April 19 and in the manner chosen to end it. VII. The Attorney General's Decision to End the Stand-o the children as shields Another factor that went into the FBI's recommendation to the Attorney General to end the standoff on day 51 was the fear that the Davidians might attempt to breakout of the residence using the children as human shields. According to the Justice Department Report, ``some [unnamed] experts'' had suggested this possibility and that to combat this possibility, the FBI had to be certain that its best trained troops (the Hostage Rescue Team members) would be on the scene.\572\ There was some doubt a