USAMRIID conducted research on anthrax though it claims never to have used the sort of weaponized anthrax found in the letters sent to Senators Tom Daschle, DS.D. 레히 상원의원에게 보낸 편지에서 발견된 종류의 무기화된 탄저균을 사용한 적이 없다고 주장합니다. Nonetheless the FBI has gone to great lengths to find evidence in the Frederick, Md.