On May 22, a commercial lab informed the Pentagon that the Defense Department had accidently shipped it live anthrax. The announcement set off investigations and the monitoring of 86 labs and 21 people (15 Defense Department employees, six not) in eight countries including the United States. Yesterday, the Pentagon released its comprehensive review report, which blames the debacle on poorly designed procedures for killing anthrax.

“DoD personnel appear to have followed their own protocols correctly,” the report says. “However, the committee found inherent deficiencies in protocols for three phases in the production of inactive spores that could lead to non-sterile products: 1) radiation dosing, 2) viability testing, and 3) aseptic operations (contamination prevention). These deficiencies and other factors contributed to the establishment of protocols that do not completely or permanently sterilize these samples.”