Chuexeng's US Studies puzzle

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Across
  1. 3. Nikola Tesla
  2. 6. Biggest country in the world
  3. 7. I'm British or Spanish or I don't know
  4. 9. If you pop your head out you die instantly by a sniper
  5. 10. An Optimist and wanted no trouble
Down
  1. 1. Salut, bonjour
  2. 2. The blamed one in the war to end all wars
  3. 4. Killed
  4. 5. Shakespeare
  5. 8. A powerful group of people with weapons