The resulting report , dated February 1999 , was subsequently seen by some as a " blueprint " for the 2001 anthrax attacks . Amongst other things , it suggested the maximum amount of anthrax powder – 2.5 grams – that could be put in an envelope without making a suspicious bulge . The quantity in the envelope sent to Senator Patrick Leahy in October 2001 was .871 grams . After the attacks , the report drew the attention of the media and others , and led to their investigation of Patrick and Hatfill
2001 anthrax attacks
2001 anthrax attacks
Steven Hatfill