Editing Fat Man (section)

==Naming==
{{Further|Little Boy#Naming}}
The gun-type and implosion-type designs were codenamed "[[Thin Man (nuclear bomb)|Thin Man]]" and "Fat Man", respectively. These code names were created by [[Robert Serber]], a former student of Oppenheimer's who worked on the Manhattan Project. He chose them based on their design shapes; the Thin Man was a very long device, and the name came from the [[Dashiell Hammett]] detective novel ''[[The Thin Man]]'' and [[The Thin Man (film)|series of movies]]. The Fat Man was round and fat and was named after [[Sydney Greenstreet]]'s character in Hammett's ''[[The Maltese Falcon (1941 film)|The Maltese Falcon]]''. The [[Little Boy]] uranium gun-type design came later and was named only to contrast with the Thin Man.{{sfn|Serber|Crease|1998|p=104}} Los Alamos's Thin Man and Fat Man code names were adopted by the [[United States Army Air Forces]] in their involvement in the Manhattan Project, codenamed [[Silverplate]]. A cover story was devised that Silverplate was about modifying a [[Pullman (car or coach)|Pullman car]] for use by President [[Franklin Roosevelt]] (Thin Man) and United Kingdom Prime Minister [[Winston Churchill]] (Fat Man) on a secret tour of the United States.{{sfn|Bowen|1959|p=96}} Air Forces personnel used the code names over the phone to make it sound as though they were modifying a plane for Roosevelt and Churchill.{{sfn|Rhodes|1986|p=481}}