In 1958 the U.S. Air Force mistakenly dropped an atom bomb on South Carolina. A B-47 was over Mars Bluff when navigator Bruce Kulka accidentally released the device. Its fissionable core was stowed elsewhere, fortunately, but the bomb still contained thousands of pounds of conventional explosives. It fell 15,000 feet into the home of William Gregg, where it created a mushroom cloud and left a 75-foot crater.

Presumably they raised his insurance rates.