''Fat Man and Little Boy'' (a.k.a. ''Shadow Makers'' in the UK) is a 1989 film that reenacts the Manhattan Project, the secret Allied endeavor to develop the first nuclear weapons during World War II. The film is named after the weapons "Fat Man" and "Little Boy" detonated over Nagasaki and Hiroshima, respectively. The code names, originally Fat Man and Thin Man, were drawn from characters in the works of Dashiell Hammett.
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