Operation Fishbowl JULY 8-9, 1962 Cold War Johnston Atoll The United States did not nuke the sky by accident. It put a thermonuclear warhead on a Thor missile, launched it from Johnston Island, and detonated it roughly 400 kilometers above the Pacific. The shot was Starfish Prime, part of Operation Fishbowl, and the yield was about 1.4 megatons. The Cold War logic was clean enough on paper. If the Soviets were building missiles, America needed to know what nuclear explosions would do above the atmosphere. Could a high-altitude burst blind radar? Kill incoming warheads? Break communications? Fry electronics? Turn the upper atmosphere into a weapon? So they tested it. The blast lit the Pacific and produced an electromagnetic pulse stronger than expected. Some instruments failed because the event outran the measurement plan. In Hawaii, about 900 miles away, streetlights went out, burglar alarms started screaming, and the telephone systems was damaged. Nobody dropped a bomb on Honolulu, the wiring got fried from space. Then came the interesting part, the unintended consequences. Starfish Prime injected charged particles into Earth’s magnetic field and helped create an artificial radiation belt. Satellites started dying early. NASA was learning how to operate inside the natural Van Allen belts. Washington had just unintentionally built a dirty training field overhead. This is where the conspiracy version gets lazy. The CIA did not secretly launch the shot. The test belonged to the geniuses at the weapons and defense establishment and approved by JFK. But the intelligence world lived inside the consequences. It watched Soviet nuclear tests, measured foreign capabilities, and read signatures. We’re all lucky that nuking the sky “only” burned out satellites and blacked out cities. If they’d kept going, I wonder how many nukes would it take to destroy the atmosphere and humanity with it.