Four-minute warning
1953–1992 British nuclear public alert system / From Wikipedia, the free encyclopedia
For the song by Mark Owen, see Four Minute Warning (song).
The four-minute warning was a public alert system conceived by the British Government during the Cold War and operated between 1953 and 1992. The name derived from the approximate length of time from the point at which a Soviet nuclear missile attack against the United Kingdom could be confirmed and the impact of those missiles on their targets.
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