Manhattan project

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Across
  1. 4. north american country that helped with the project
  2. 5. type of cloud an explosion creates
  3. 9. what year was the project started
  4. 11. country that founded the project
  5. 12. what age the creation of the bomb created
  6. 14. during what war did the project take placw
  7. 16. second country a nuclear bomb was used on
  8. 17. name of the first successful detonation
  9. 19. first city a nuclear bomb was used on
Down
  1. 1. country that helped with the project
  2. 2. year the bomb was created
  3. 3. what country the bomb was used against
  4. 6. the leader of the project
  5. 7. what was created by the project
  6. 8. country that discovered nuclear fission
  7. 10. largest nuclear bomb detonated
  8. 13. what is left behind after a bomb explodes
  9. 15. nickname for the first bomb that was dropped
  10. 18. nickname for the second bomb that was dropped