A 1965 image shows a replica of a Fat Man nuclear bomb, the type dropped on Nagasaki, Japan, in 1945, on view for the public in Los Alamos, N.M.

It took decades, but John Coster-Mullen has pieced together specs for America's first nuclear bombs. Some believe his odyssey says something about North Korea's rapid nuclear progress

From the article: North Korea Designed A Nuke. So Did This Truck Driver

A 1965 image shows a replica of a Fat Man nuclear bomb, the type dropped on Nagasaki, Japan, in 1945, on view for the public in Los Alamos, N.M.

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