FREDERICK, MD - AUGUST 01:  A sign at the Veterans Gate at Fort Detrick Army Medical Research Institute of Infectious Diseases is shown August 1, 2008 in Frederick, Maryland. Earlier this week Fort Detrick employee Bruce Ivins, a former researcher at the Army Medical Research Institute of Infectious Diseases, committed suicide after learning investigators were going to charge him with the 2001 anthrax attack. Getty Images logo Getty Images 11 months ago

FREDERICK, MD - AUGUST 01: A sign at the Veterans Gate at Fort Detrick Army Medical Research Institute of Infectious Diseases is shown August 1, 2008 in Frederick, Maryland. Earlier this week Fort Detrick employee Bruce Ivins, a former researcher at the Army Medical Research Institute of Infectious Diseases, committed suicide after learning investigators were going to charge him with the 2001 anthrax attack.