Nuclear Countdown This 1978 film traces the history of the arms race back to 1945, the year that witnessed the birth of the UN and the dropping of the first atomic bombs on Hiroshima and Nagasaki. Categories: Nuclear Issues, Social Concern, War & Peace Tags: 1978, Cold War, Nuclear war, UN, United Nations, US, USSR, WMDs Producer: United NationsYear Produced: 1978Running time: 28 minutesWatch online: ideo on demand