Related Clues:

• Fat Man was one
• ''Fat Man,'' e.g.
• WWII development
• Oppenheimer subj.
• Focus of the Manhattan Project, briefly
• WWII-ending weapon
• Los Alamos project
• Manhattan Project weapon
• Fat Man in New Mexico, e.g.
• Enola Gay payload
• W.W. II-ending weapon, for short
• Mushroom cloudmaker
• Mushroom cloud maker, briefly
• Los Alamos project, briefly
• Manhattan Project weapon, for short