50's

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Across
  1. 2. things or groups that are joined
  2. 3. a race to get to space first
  3. 5. negotiating tactic
  4. 6. to go against
  5. 8. state of flourishing/thriving
  6. 10. the state of being the same
  7. 11. advocate for communism
Down
  1. 1. military physical definitions
  2. 4. process of combining separate parts
  3. 7. time of increased birth rates
  4. 9. North atlantic treaty organization