No trace of the jet was ever found. In the early hours of February 5, 1958, a B-47 bomber with a 3,400-kilogram (7,500-pound) Mark 15 nuclear bomb on board accidentally collided with an F-86 ...

But decades later, in 1994, documents released from a 1966 Congressional testimony revealed that the Tybee Mark 15 was indeed an intact nuclear weapon. The Tybee bomb is hardly an isolated incident.