False Alarm with Maximum Confidence

Just after midnight at Serpukhov-15 in 1983, Soviet early-warning satellites falsely reported a U.S. missile strike. Lieutenant Colonel Stanislav Petrov, facing urgent alarms and extreme time pressure, judged the alert implausible and reported it as a false alarm, waiting for corroboration that never came. The episode shows how confident machines can be wrong and how one person’s judgment within a flawed system prevented escalation — a stark lesson about design, doctrine, and the fragile margins that separate continuity from catastrophe.