History's Greatest Mysteries (2020)

S7E19 The 2001 Anthrax Attacks

The FBI is stretched to its breaking point as lethal anthrax spores delivered through the postal system claim five victims. Agents race against the clock to trace the source, but each new contaminated letter compounds the chaos. With the public on edge and resources dwindling, the investigation becomes a desperate hunt to uncover the sender before more lives are lost to this audacious act of biological warfare.