Question: The One-Million-Liter Test Sphere — also known as the Test Sphere, the Horton Test Sphere, the Cloud Study Chamber, Building 527, and the “Eight Ball” (or “8-ball”) — is a decommissioned biological warfare (BW) chamber and testing facility located on which United States Army Medical Command installation located in Frederick, Maryland?

full_context: Document 1: Fort Detrick: Fort Detrick is a United States Army Medical Command installation located in Frederick, Maryland. Historically, Fort Detrick was the center of the US biological weapons program from 1943 to 1969. Since the discontinuation of that program, it has hosted most elements of the United States biological defense program.
Document 2: Forest Glen Annex: The Forest Glen Annex is a 136 acre U.S. Army installation in the Forest Glen neighborhood of Silver Spring, Maryland, USA. It is situated between Brookville Road and Linden Lane. Since 1999, the Annex has been the site of the Walter Reed Army Institute of Research (WRAIR) and the Naval Medical Research Center (NMRC), along with smaller units. In addition to the large research laboratories located in the Annex’s "Daniel K. Inouye Building" (Building 503), the post includes a commissary, a child care center, and a Fisher House. There are also football and baseball fields, and picnicing facilities. In 2011, in accordance with the most recent Base Realignment and Closure (BRAC) recommendations, the Forest Glen Annex became home to the National Museum of Health and Medicine (NMHM) as well as a "Joint Center of Excellence in Infectious Disease Research." The former post exchange was repurposed as office space and a new Army and Air Force Exchange Service (AAFES) was opened at the Walter Reed National Military Medical Center.
Document 3: Building 257: Building 257, also known as Lab 257, was a United States biological warfare research laboratory located at Fort Terry on Plum Island, New York. Originally intended for munitions storage, the facility researched anti-animal biological agents beginning in 1952 under the United States Army. Biological warfare research continued in the building under the United States Department of Agriculture (USDA) until a new laboratory was completed.
Document 4: United States biological defense program: The United States biological defense program — in recent years also called the National Biodefense Strategy — began as a small defensive effort that paralleled the country's offensive biological weapons development and production program, active between 1943 and 1969. Organizationally, the medical defense research effort was pursued first (1956-1969) by the U.S. Army Medical Unit (USAMU) and later, after the discontinuation of the offensive program, by the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID). Both of these units were located at Fort Detrick, Maryland, where the U.S. Army Biological Warfare Laboratories were headquartered. The current mission is multi-agency, not exclusively military, and is purely to develop defensive measures against bio-agents, as opposed to the former bio-weapons development program.
Document 5: BioWatch: BioWatch is a United States federal government program to detect the release of pathogens into the air as part of a terrorist attack on major American cities. Reportedly operating in Philadelphia, New York City, Washington, DC, San Diego, Boston, Chicago, San Francisco, Atlanta, St. Louis, Houston, Los Angeles and 21 other cities, the BioWatch program was created in 2001 in response to the increased threat of bioterrorism sparked by the 2001 anthrax attacks, and was announced in President George W. Bush's State of the Union Address of 2003.
Document 6: One-Million-Liter Test Sphere: The One-Million-Liter Test Sphere — also known as the Test Sphere, the Horton Test Sphere, the Cloud Study Chamber, Building 527, and the “Eight Ball” (or “8-ball”) — is a decommissioned biological warfare (BW) chamber and testing facility located on Fort Detrick, Maryland, USA. It was constructed and utilized by the U.S. Army Biological Warfare Laboratories as part of its BW research program from 1951 to 1969. It is the largest aerobiology chamber ever constructed and was placed on the National Register of Historic Places in 1977.
Document 7: Building 40 (Army Medical School): Building 40, Army Medical School is a Georgian revival structure in the Walter Reed Army Medical Center complex in northern Washington, D.C., USA. It was built between 1922 and 1932 to house the Army Medical School, which became the Army Medical Center in 1923 when it — under the name “Medical Department Professional Service School” (MDPSS) — combined with the Walter Reed General Hospital. The MDPSS ultimately became the Walter Reed Army Institute of Research, which occupied Building 40 from 1953 to 1999. It comprises four wings, known as the Craig (1924), Sternberg and Vedder (1932), and Siler (1962) Pavilions and is situated at 14th and Dahlia Streets.
Document 8: Neutral Buoyancy Simulator: The Neutral Buoyancy Simulator was a neutral buoyancy pool located at NASA's George C. Marshall Space Flight Center (MSFC). Engineers and astronauts developed hardware and practiced procedures in this tank from its completion in 1968 through its decommissioning in 1997. Marshall recognized the need for underwater simulations of extra-vehicular activities (EVAs) and developed three successively larger tanks for the purpose. The Neutral Buoyancy Simulator contributed significantly to the American manned space program. Skylab, the Space Shuttle, Hubble Space Telescope, and the International Space Station have all benefited from the Neutral Buoyancy Simulator. Until Johnson Space Center constructed the Weightless Environment Test Facility in the mid-1970s, MSFC had the only NASA-owned test facility that allowed engineers and astronauts to become familiar with the dynamics of body motion under weightless conditions.
Document 9: Bruce Edwards Ivins: Bruce Edwards Ivins (April 22, 1946 – July 29, 2008) was an American microbiologist, vaccinologist, senior biodefense researcher at the United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Maryland, and the key suspect in the 2001 anthrax attacks.
Document 10: Spacecraft Magnetic Test Facility: The Spacecraft Magnetic Test Facility, also known historically as the Attitude Control Test Facility, is an experimental spacecraft test facility at the Goddard Space Flight Center in Greenbelt, Maryland, United States. It was built in 1966 to allow the evaluation of magnetic movement in manned and unmanned spacecraft, and for the precision calibration of magnetometers used in space flight. The building is constructed of non-magnetic materials and contains a magnetic coil system that allows the cancellation of the Earth's magnetic field. This unique building was designated a National Historic Landmark in 1985.
Document 11: Mound Laboratories: Mound Laboratories in Miamisburg, Ohio was an Atomic Energy Commission (later Department of Energy) facility for nuclear weapon research during the Cold War, named after the nearby Miami Indian burial mound.
Document 12: Walter Reed Army Medical Center: The Walter Reed Army Medical Center (WRAMC) — known as Walter Reed General Hospital (WRGH) until 1951 — was the U.S. Army's flagship medical center from 1909 to 2011. Located on 113 acre in Washington, D.C., it served more than 150,000 active and retired personnel from all branches of the military. The center was named after Major Walter Reed (1851–1902), an army physician who led the team that confirmed that yellow fever is transmitted by mosquitoes rather than direct contact.
Document 13: Allegany Ballistics Laboratory: Allegany Ballistics Laboratory (ABL) located in Rocket Center, West Virginia, is a diverse industrial complex employing some 1,000 people across 1628 acre . The facility is a member of the Federal Laboratory Consortium and is operated by Alliant Techsystems (ATK) under contract with the Naval Sea Systems Command (NAVSEA).
Document 14: 267th Chemical Company: The 267th Chemical Company was a military unit of the U.S. Army Chemical Corps responsible for the surety of chemical warfare agents dubbed "RED HAT" deployed to the Islands of Okinawa, Japan and subsequently Johnston Atoll in the Pacific Ocean. A recently discovered Army document reveals that the true mission of the 267th Chemical Company was the operation of the Okinawa deployment site as part Project 112. Project 112 was a 1960s biological warfare field test program that was conducted by the Deseret Test Center. Okinawa is not listed as a test site under Project 112 by the U.S. Department of Defense.
Document 15: Von Karman Gas Dynamics Facility: The von Karman Gas Dynamics Facility at Arnold Engineering Development Complex, Arnold Air Force Base, Tennessee, provide aerothermal ground test simulations of hypersonic flight over a wide range of velocities and pressure altitudes. The facility consists of three Hypersonic wind tunnels: Tunnel A, B, and C. The wind tunnels can be run for several hours at a time thanks to a 92,500 horsepower air compressor plant system. The test unit is owned by the United States Air Force and operated by Aerospace Testing Alliance.
ground_truth: Fort Detrick