What do you know about the USA?

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Across
  1. 1. the capital city of the USA
  2. 4. the biggest state
  3. 8. the place where the President lives
  4. 9. July,4th, 1776
  5. 10. July, 1969
  6. 11. the number of states in the USA
  7. 13. the smallest state
Down
  1. 2. the name of the US flag
  2. 3. Puritans who emigrated to the US in the 18th century
  3. 5. the number of British colonies before independence
  4. 6. He abolished slavery in 1863
  5. 7. the first president of the US
  6. 12. the number of boroughs in New York