Another super awesome crossword

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Across
  1. 2. Meriwether ______
  2. 3. Native American guide for the expedition west
  3. 8. Lincoln
  4. 9. "________ Purchase," bought for 3 cents an acre
  5. 10. "the Hoosier State"
  6. 11. Trenton
  7. 12. Blackbeard hid his treasure here
  8. 16. Home of the Mall of America
  9. 18. Tallahassee
Down
  1. 1. Albany
  2. 3. Home of Mount Rushmore
  3. 4. Dairy capital of the US
  4. 5. Little Rock
  5. 6. Topeka
  6. 7. the smallest state
  7. 13. destination of the trail of tears
  8. 14. Denver
  9. 15. William _______
  10. 17. "the Buckeye State"