उत्तरी अटलांटिक संधि संगठन (NATO) की स्थापना किस वर्ष की गई थी?

Arrange the following historical events related to the Cuban Missile Crisis and broader Cold War developments in the correct chronological order: A. Fidel Castro established a socialist regime in Cuba after the overthrow of Batista. B. John F. Kennedy assumed office as the youngest elected President of the United States. C. Pope John XXIII issued a public appeal urging both superpowers to avoid nuclear confrontation during the crisis. D. A United States U-2 reconnaissance aircraft was shot down over Cuban airspace at the peak of tensions. E. Nikita Khrushchev communicated his decision to dismantle and withdraw Soviet nuclear missiles from Cuba. Choose the correct sequence:

'United States of America will respect the inviolability of Cuban borders, its sovereignty, that it take the pledge not to interfere in internal affairs...' With this formal reply from Kennedy, a major crisis came to an end. What was the duration of this crisis?