00:00In 1965, the U.S. Army sprayed a cloud of bacteria over the New York City subway system.
00:06Millions of people breathed it in. None of them knew.
00:10This wasn't an accident. It was a test.
00:12Between 1950 and 1969, the Army ran over 200 secret experiments on American cities.
00:19They called it vulnerability testing.
00:21They wanted to know how fast a biological agent could spread through a civilian population.
00:26In San Francisco, Navy ships released clouds of Serratia marcescens bacteria across the bay.
00:32Army personnel tracked the plume as it drifted inland.
00:35In the weeks that followed, local hospitals recorded a spike in rare bacterial infections.
00:41At least one man died.
00:42His doctors traced the infection directly to the strain the military had released.
00:46The Army had classified the bacteria as harmless.
00:50They made that decision without telling a single person who was breathing it.
00:54The public didn't find out for decades.
00:56This wasn't a rogue operation.
00:58It wasn't one bad actor.
01:00It was official policy, signed off at the highest levels.
01:03The government ran experiments on its own people and called it national security.
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