How do you know USA?

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Across
  1. 4. Where do many famous actors live?
  2. 6. He walked on the Moon
  3. 9. The USA’s national flower
  4. 10. "God Bless ..." (a song)
  5. 12. Ocean on the East Coast
  6. 13. A small brown coin
  7. 14. River in the Grand Canyon
  8. 15. A color on the USA flag
Down
  1. 1. Holiday on July 4th
  2. 2. State with Disney World
  3. 3. The USA’s national anthem
  4. 5. The biggest state in the USA
  5. 7. The flag has stars and ...
  6. 8. The place where leaders make laws
  7. 11. State with many islands