Bomb puzzle

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Across
  1. 2. the weapon that the world was racing to make
  2. 5. first site where the atomic bomb was dropped
  3. 6. the other enemy force alongside Germany
  4. 8. the first name of the main scientist
  5. 10. chemical used to make an atomic bomb
  6. 11. test site for the first atomic bomb
  7. 13. one of the enemy forces against america
  8. 15. heavy water plant in Norway
  9. 16. project to build atomic bomb
  10. 18. style of government in the Soviet union
  11. 19. the leader of Germany during WWII
  12. 20. courer and spy for the soviets
Down
  1. 1. allies with US and sent spies to gather intel
  2. 3. the site for the manhattan project
  3. 4. allies with US
  4. 7. the first country to finish the bomb
  5. 9. the president of the US during WWII
  6. 12. chemical used to make atomic bomb
  7. 14. the leader for the soviet union
  8. 17. german scientist that americans tried to kill