Glenn Greenwald: Vital unresolved anthrax questions and ABC News

The FBI's lead suspect in the September, 2001 anthrax attacks -- Bruce E. Ivins -- died Tuesday night, apparently by suicide, just as the Justice Department was about to charge him with responsibility for the attacks. For the last 18 years, Ivins was a top anthrax researcher at the U.S. Government's biological weapons research laboratories at Ft. Detrick, Maryland, where he was one of the most elite government anthrax scientists on the research team at the U.S. Army Medical Research Institute of Infectious Disease (USAMRIID).