What were the nuclear near-misses in world history? 
A 4-minute-long video lists several nuclear near-misses in the world's history. During the 1962 Cuban Missile Crisis, US attacked USSR's submarine which was carrying a nuclear torpedo, however, a nuclear retaliation was averted because of a Soviet official. Russia became the only country to activate its nuclear briefcase after mistaking a Norwegian research rocket for a US missile in 1995.