True Story: 55 years ago, a B-47 dropped a nuclear bomb on South Carolina

And not just any bomb, an 8,000-LB Mark 6 (Fat Man, detonated over Nagasaki, was an earlier Mark 3 model).

Let's go to the newsreel (about a minute long)…

You can still visit the bomb crater in Mars Bluff, SC. Details here.

Incredibly Mars Bluff wasn't an isolated incident. In 1961, a B-52 crashed and accidentally dropped a pair of far-more-powerful Mark 39s onto Goldsboro, NC. The bombs' safety mechanisms meant to prevent accidental detonations worked in this case, albeit barely. [Details.]