Air Force One

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Across
  1. 4. Between green and violet
  2. 6. Corridor, e.g.
  3. 7. First POTUS pilot, Lt Col Henry ____
  4. 8. Discontinued in 1988 Government-branded perk on AF1
  5. 12. First POTUS to use an aircraft while in office
  6. 13. Callsign for POTUS on a civilian aircraft
  7. 15. An expedition to observe animals in their natural habitat
  8. 17. A 1946 sub-base of Bolling Field
  9. 18. Only other Presidential conveyance type using the AF1 Livery (i.e. UP 4141)
  10. 19. First POTUS to publicly use "Air Force One"
  11. 20. Latin word for drink or draught
  12. 21. A Government-branded candy perk on AF1
Down
  1. 1. Short close fitting ladies jacket
  2. 2. Lt ____: Died in the crash of their de Havilland DH.4 at the end of WWI
  3. 3. L3 Namesakes LaPenta, Lanza, and ____ Brothers
  4. 5. Word preceeding both XX and XX
  5. 9. One of a pair of Air Force Ones?
  6. 10. The founder of Pacific Aero Products Company, William E. ____
  7. 11. Organization whose motto is "Only the Best is Good Enough"
  8. 14. Major General Clarence ____; An Osage from Pawhuska, Oklahoma
  9. 16. Laurence ____; A reporter who died in a plane crash at Saugus, Massachusetts