The documentary recounts the world's first nuclear attack and examines the alarming repercussions. Covering a three-week period from the Trinity test to the atomic bombing of Hiroshima, the program chronicle...展开s America's political gamble and the planning for the momentous event. Archival film, dramatizations, and special effects feature what occurred aboard the Enola Gay (the aircraft that dropped the bomb) and inside the exploding bomb.
 Eyewitness interviews
Five Japanese survivors are interviewed; Kinuko Laskey who was a nurse in a communications hospital, Army cadet Morio Ozaki, 16 year old tram driver Toruko Fujii, Thomas Takashi Tanemori who was an 8 year old schoolboy, Dr Shuntaro Hida a doctor at a military hospital and 17 year old city bank clerk Akiko Takakura.
From the United States the interviewees are; Paul Tibbets who was the commanding officer and pilot of the Enola Gay, Theodore Van Kirk the navigator of the aircraft, Morris R. Jeppson the weapon test officer and Russell Gackenbach who was the navigator of the accompanying photographic aircraft Necessary Evil. Whitehouse Map Room Duty Officer George Elsey is interviewed as an eyewitness to the Potsdam Conference.