Pete's Patriotic Puzzle

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Across
  1. 2. Location of the Constitutional Convention
  2. 6. Location of America's first subway system
  3. 7. First US President not to own slaves
  4. 9. New York's original name
  5. 11. First president to declare war
  6. 13. Location that Washington and the Continental Army camp in the winter of 1977
  7. 15. First permanent colony in the US
Down
  1. 1. State that seceded from Virginia in 1863
  2. 3. 1943 Conference between the US and UK
  3. 4. Country that US bought Alaska from
  4. 5. First liaison between Native Americans & Pilgrims
  5. 8. Oldest institute of higher education in the US
  6. 10. Country that gifted the Statue of Liberty
  7. 12. Call sign of the President's helicopter
  8. 14. The island the "USS Charleston" was sent to take over during the Spanish-American war