Happy Birthday

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Across
  1. 4. A Greeen Card gives a person
  2. 7. Month the country celebrates 250th birthday
  3. 8. Low post should be
Down
  1. 1. Simpsons sit on
  2. 2. Slow down when they are present
  3. 3. Billy Joel is in what state of mind?
  4. 5. Amendment protecting religion
  5. 6. Sin City
  6. 9. Not old