"This Government, as promised, has maintained the closest surveillance of the Soviet Military buildup on the island of Cuba. Within the past week, unmistakable evidence has established the fact that a series of offensive missile sites is now in preparation on that imprisoned island. The purpose of these bases can be none other than to provide a nuclear strike capability against the Western Hemisphere. " - JFK, 1962 What event is JFK referring to? Why was it inmportant? Why did it happen? How did it end? (2-3 sentences)​