Nikita Khrushchev started decrying that John F. Kennedy's "quarantine" was an act of aggression which led to "The abyss of a world nuclear-missile war". JFK read Nikita Khrushchev's outraged letter and summarized" Those ships are coming through".
as the missile were still being armed the United States prepared its self for a possible invasion.
after that started the most intense 6 days of the cold war. the united states Kept demanding the USSR and Cuba to remove the missiles from the Island but they insisted that they were only defensive.
after the secret meeting in Washington D.C. Dorbrymin cabled Moscow and basically said"We must not miss this chance". the next day at 9:00 am, Khrushchev announced the removal of the missiles and the crisis was finally Done.
the United states would remove their missiles from Italy and turkey and promised to never invade Cuba if the USSR withdraw from Cuba