Oct. 22, Kennedy ordered a naval blockade of Cuba. Khrushchev sent a letter stating that Soviet ships would attempt to sail through the USA blockade, eventually, they didn't. However, some missiles and warheads made it to Cuba before the blockade. The USA threatented an invasion; Castro called for a nuclear strike from the USSR.
Dear Mr. Kennedy, we would withdraw the missiles in Cuba if you can guarantee to not to invade Cuba. Your Dear friend, Nikita Sergeyevich Khrushchev
A U2 spy plane was shot down over Cuba and the pilot killed. Kennedy was urged to start an invasion but he delayed.
Dear Mr. Kennedy, Nice to see you again. I've got a brand new updated offer on missiles in Cuba for you. if you remove the missile in Turkey, I will also remove my missiles in Cuba. Your Dear friend again, Nikita Sergeyevich Khrushchev
"Well, Okay! But no official deal will be done! We just make a non- official deal Khrushchev, which guarantee them with not to not to invade Cuba again and remove Turkish missiles in the 'near future'."
Khrushchev accepted these terms, ending the crisis......