Clone of Manhattan Project

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Across
  1. 3. American physicist helped develop the first nuclear bomb
  2. 5. Country that dropped the atomic bomb
  3. 8. Name of the atomic bomb that was dropped in Nagasaki.
  4. 9. Where the first nuclear bomb was exploded (two words).
  5. 11. President whom a scientist wrote to in regards to the development of nuclear weapons
Down
  1. 1. Name of the bomber that dropped the atomic bomb in Japan (two words).
  2. 2. Long term consequence from the atomic bomb.
  3. 4. Main component of the atomic bomb.
  4. 6. The atomic bomb ended this (three words: first word is number-related).
  5. 7. Scientist who wrote to the aforementioned President
  6. 10. Name of the atomic bomb that was dropped in Hiroshima.