Study Questions Government Case on Anthrax Attacks

The science behind the U.S. government's investigation into the 2001 anthrax mailings does not rule out the possibility that the spores used in the attacks came from a source other than the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) in Frederick, Maryland. That's the conclusion of a just-released National Academies' review of the scientific evidence related to the case, which was formally closed by the Federal Bureau of Investigation (FBI) and the Department of Justice in February 2010, more than 9 years after the letters killed five people and terrorized the nation.