Tell me like I'm 5

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Across
  1. 3. Plan
  2. 6. of the Berlin Wall
  3. 7. Bill of 1945
  4. 9. F Kennedy
  5. 10. Arms Race
  6. 11. Missile Crisis
Down
  1. 1. McCarthy
  2. 2. Doctrine
  3. 4. of NATO
  4. 5. Assured Destruction
  5. 8. War
  6. 12. of Pigs Invasion