Letters were mailed Sending containing anthrax spores to several news media offices and to Democratic Senators Tom Daschle and Patrick Leahy , killing Killing 5 people and infecting Bodily_harm 17 others .

In 2008 , the FBI requested Request a review of the scientific methods used in their investigation Criminal_investigation from the National Academy of Sciences , which released Publishing their findings in the 2011 report `` Review of the Scientific Approaches Used During the FBI 's Investigation Criminal_investigation of the 2001 Anthrax Letters . ''