45 years ago this morning at 2:26 A.M. EDT, warning displays at the Strategic Air Command suddenly indicated a Soviet SLBM attack on the United States was underway, first showing 2 and then, 18 seconds later, 200 inbound ballistic missiles. SAC ordered all alert bomber crews to start their engines.
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(Three minutes later, duty officers at NORAD determined this was a false alarm because early-warning satellites and ground-based radars had not detected an attack.)
Of course the Russians had a similar issue
https://www.reddit.com/r/interestingasfuck/comments/1cy0f4c/in_september_1983_soviet_military_officer/