What in 1962 what did JFK learn was being built in cuba?

In 1962, President John F. Kennedy learned that the Soviet Union was constructing missile sites in Cuba, which were capable of launching nuclear missiles. This discovery intensified Cold War tensions and led to the Cuban Missile Crisis, a 13-day confrontation between the United States and the Soviet Union. Kennedy's administration faced the critical challenge of responding to this threat while avoiding escalation into nuclear war. Ultimately, the crisis was resolved when the U.S. agreed to remove its missiles from Turkey in exchange for the withdrawal of Soviet missiles from Cuba.