Which Cold War event brought the world closest to nuclear war?

Question

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The Cuban Missile Crisis in 1962 brought the world closest to nuclear war, as the United States and Soviet Union nearly engaged in a full-scale nuclear confrontation over Soviet missiles being placed in Cuba. The situation was resolved through intense diplomatic negotiations and a secret agreement between the two countries, but the threat of a nuclear war was also a wake-up call for both nations to pursue arms control measures in order to prevent such a crisis from happening again.

Which Cold War Event Brought the World Closest to Nuclear