https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_collision#Midair_collision https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_coll... > The crew r

https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_collision#Midair_collision https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_coll... > The crew requested permission to jettison the bomb, in order to reduce weight and prevent the bomb from exploding during an emergency landing. Permission was granted, and the bomb was jettisoned at 7,200 feet (2,200 m) while the bomber was traveling at about 200 knots (370 km/h). The crew did not see an explosion when the bomb struck the sea. > Some sources describe the bomb as a functional nuclear weapon, but others describe it as disabled. If the bomb had a plutonium nuclear core installed, it was a fully functional weapon. If the bomb had a dummy core installed, it was incapable of producing a nuclear explosion but could still produce a conventional explosion. The 12-foot (4 m) long Mark 15 bomb weighs 7,600 pounds (3,400 kg) and bears the serial number 47782. It contains 400 pounds (180 kg) of conventional high explosives and highly enriched uranium. The Air Force maintains that the bomb's nuclear capsule, used to initiate the nuclear reaction, was removed before its flight aboard B-47.