The Cuban Missile Crisis erupted in October 1962 when U.S. reconnaissance flights discovered that the Soviet Union was installing nuclear-armed missiles in Cuba, just 90 miles from Florida. This posed an immediate threat to the U.S. as missiles stationed so close could strike targets across much of America without warning. In response, President Kennedy imposed a naval blockade around Cuba and demanded that the Soviets remove the missiles. The crisis intensified as Soviet ships approached the blockade but negotiations continued. Ultimately, the Soviets agreed to withdraw the missiles in exchange for assurances from the U.S. that it would not invade Cuba, helping to resolve the crisis peacefully.