The 2001 anthrax attacks on the United States, one of the largest and most complex FBI investigations in history, claimed five lives and left 17 others ill, becoming one of the worst biological attacks in US history, following closely after the 9/11 terrorist attacks.
The Anthrax Attacks
The FBI uncovers a trail of deadly letters sent to the US, sparking a high-stakes investigation into a wave of bioterrorism attacks that left the nation in chaos.