Nuclear bomb crater in rural South Carolina

The bomb was a 26-kiloton Mark 6, a more powerful version of the Fat Man dropped on Nagasaki. It mistakenly fell out of a B-47 jet, dropping 15,000 feet into the back yard of Walter Gregg and his family. The plutonium core didn't explode, but the 6,000 pounds of conventional high explosives detonated, transforming the Gregg's vegetable garden into a vast muddy crater and destroying their house.