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?
Sentence (from "One-Million-Liter Test Sphere"): It was constructed and utilized by the U.S. Army Biological Warfare Laboratories as part of its BW research program from 1951 to 1969.
Relevant evidence: No