Documentary marking the 70th anniversary of the day the world's first atomic bomb was detonated above the Japanese city of Hiroshima on August 6, 1945. Featuring a minute-by-minute account of what happened on that tragic day, through archive footage and interviews with eyewitnesses who rarely speak about their experience of the bombing. Also interviewed is navigator Theodore Van Kirk, who was the last surviving member of the crew who dropped the bomb, before his death in 2014.