Reacted: Operation Sea Spray – The US Military’s Secret Biological Experiment on San Francisco

In this gripping episode of Reacted, we uncover one of the most controversial and little-known chapters of Cold War-era military history: Operation Sea Spray. Join us as we dive into the shocking details of how, in 1950, the U.S. Navy deliberately sprayed the skies over San Francisco with a cloud of bacteria—Serratia marcescens—as part of a secret biological warfare test.

We’ll explore the origins of the operation, its goals, and the chilling reality of how unsuspecting residents were exposed to potentially harmful microbes. Discover how the military, in collaboration with scientists, sought to study the vulnerability of American cities to biological attacks, all under the guise of national ...