Tell me like im 5

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Across
  1. 4. attempt to remove fidel castro
  2. 5. war between north and south korea
  3. 6. all countries fighting are destroyed
  4. 11. usa stops russia from making missiles
  5. 12. wall around berlin to stop people from leaving
Down
  1. 1. competition for most weapons
  2. 2. countries joining together for protection
  3. 3. warned usa about spies
  4. 7. speech given by president truman
  5. 8. 35th president of the united states
  6. 9. protects service members after war
  7. 10. rebuilds countries after war