A Russian Colonel story that prevents Word War III

Lieutenant Colonel Stanislav Petrov was the officer on duty at the Serpukhov-15 bunker near Moscow on September 26, 1983, a time when the Cold War was at a peak: just three and a half weeks prior, the Soviets had shot down Korean Air Flight 007, killing all 269 people on board the Boeing 747. It was Lt. Col. Petrov's responsibility to observe the satellite early warning network and notify his superiors of any impending nuclear missile attack against the USSR. In the event of such an attack, the Soviet Union's strategy was to launch an immediate all-out nuclear counter-attack against the United States, as the doctrine of Mutual Assured Destruction required.