The anecdote out of science fiction’s history that almost everyone has heard of is the tale of how Cleve Cartmill, a competent writer of middling abilities, published a story describing the workings of the atomic bomb in a 1944 issue of John Campbell’s magazine Astounding Science Fiction, fourteen months before the first successful atomic explosion at the Alamogordo testing grounds, thus causing a Federal security agency to investigate both Cartmill and Campbell to see if there had been a leak of top-secret military information. Here's Part II. Via Boing Boing.