The did experiments on US citizens, they spread a bacteria in the SF fog to see if it would be spread to the citizens in SF. They picked a bacteria they thought was harmless, but showed up brightly on a stain for microscope slides. Turns out some people are actually harmed by this bacteria, but again, bio-warfare testing on an uninformed US civilians. A war crime. They actually killed someone:
On October 11, 1950, eleven residents checked into Stanford Hospital in San Francisco with very rare, serious urinary tract infections. Although ten recovered, Edward J. Nevin, who had had recent prostate surgery, died three weeks later from a heart valve infection. The urinary tract outbreak was so unusual that the Stanford doctors wrote it up for a medical journal. [0]
On October 11, 1950, eleven residents checked into Stanford Hospital in San Francisco with very rare, serious urinary tract infections. Although ten recovered, Edward J. Nevin, who had had recent prostate surgery, died three weeks later from a heart valve infection. The urinary tract outbreak was so unusual that the Stanford doctors wrote it up for a medical journal. [0]
[0] https://en.wikipedia.org/wiki/Operation_Sea-Spray