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.

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.