Easy-livin:
"The nuclear bomb lost off the coast of Georgia, often referred to as the "Tybee Bomb," remains missing to this day. This incident occurred on February 5, 1958, when a B-47 bomber collided with a fighter jet during a training exercise near Tybee Island. To prevent a potential crash, the crew jettisoned the Mark 15 thermonuclear bomb into the waters of Wassaw Sound".
"Despite extensive searches over the years, including military efforts and private expeditions, the bomb has not been recovered. The U.S. government maintains that the bomb poses little risk of a nuclear explosion, as its nuclear capsule was not installed. However, concerns persist regarding the potential environmental impact of its conventional explosives and radioactive materials".
https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_collision