On Sept. 26, 1983, Soviet computers reported the launch of five Minuteman missiles, according to the New York Times. There were only minutes to counterattack before they would strike Soviet cities. The man who was in charge that day was skeptical, partly because the attack seemed too small. So he alerted his superiors to a false alarm. He later recalled it as a 50-50 decision.
He had made the right choice. It would be discovered that a Soviet satellite had misinterpreted the sun’s reflection off clouds.
Read more about September 26 at When in doubt ….