October 10-11, 2001: FBI Permits Destruction of Original Batch of Ames Strain Anthrax

The FBI allows the original batch of the Ames strain of anthrax to be destroyed, making tracing the type of anthrax used in the recent anthrax attacks (see October 5-November 21, 2001) more difficult. The Ames strain actually originates from a dead cow in Texas, but Iowa State University in Ames has kept many vials of Ames and other anthrax strains collected over more than seven decades. This entire collection is destroyed. It is unclear who wanted the collection destroyed or why. The FBI learned the anthrax used in the attack letters was the Ames strain on October 5 (see October 5, 2001), but this will not be publicly confirmed until October 25. The FBI denies it approved the destruction and say they only did not oppose it, but university officials say the FBI gave explicit approval. [New York Times, 11/9/2001; South Florida Sun-Sentinel, 12/8/2001] The Ames strain is one of 89 known varieties of anthrax and is commonly used in US military research. The Washington Post will later report that “The [Ames strain identification], as compelling as a human fingerprint, shifted suspicion away from al-Qaeda and suggested another disturbing possibility: that the anthrax attacks were the work of an American bioweapons insider.” The identification of the Ames strain focuses much attention on two top US Army bioweapons laboratories in particular that have heavily used Ames: USAMRIID in Maryland and Dugway Proving Ground in Utah (see Late 2001). [Washington Post, 9/14/2003]