Stanislav Petrov, a Soviet citizen, received warnings of a U.S. nuclear attack from a computer in 1983 that could have led to World War III. Petrov's decision to wait rather than immediately report the false alarm may have saved the world from a nuclear war. The incident occurred amid heightened Cold War tensions and may have prevented a catastrophic response. The Soviet citizen was a lieutenant colonel in the Soviet Air Defense Forces and his decision to delay the alert may have averted World War II. The U.K.R. had implemented an early warning missile detection system named Oko (“Eye”), which detected an ICBM launch from the West and sent a signal to Serpukhov-15, a bunker in Russia’s Kaluga Oblast, if detected, leading to retaliatory missiles and retaliatory fire from the United States. However, Petrov was informed that the President was not in Washington at the time of the incident, which may have been a result of a computer malfunction.