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  1. Layers exposed at Polar Canyon
  2. The International Space Station in orbit above Earth
  3. A view from the Tactical Coordinators position aboard a US Navy S3B Viking aircraft
  4. A possible newfound planet spins through a clearing
  5. An M1A1 Main Battle Tank
  6. A US Marine Corps CH-46E Sea Knight helicopter begins to land
  7. A US Air Force B1B Lancer on a combat patrol over Afghanistan
  8. Close-up of the Medal of Honor award
  9. Paratroopers Fill The Sky For Operation Toy Drop At Fort Bragg, North Carolina
  10. The amphibious assault ship USS Peleliu in transit in the Pacific Ocean
  11. Hawaii By Flying Clipper, Pan American Airways System, 1938
  12. Bok Globules in NGC 281
  13. Space Shuttle Atlantis lifts off from its launch pad
  14. Amphibious assault ship USS Nassau and guided missile destroyer USS Bulkeley
  15. Ships and Rigid Hull Inflatable Boats assemble in formation
  16. An HH 65C Dolphin demonstrates a helicopter rescue
  17. Medical chart showing the signs and symptoms of sciatica
  18. Several chief petty officers combination covers lined up on a table
  19. Fully dark city lights image of Earth centered on the North Pole
  20. US Marines drive an amphibious assault vehicle ashore
  21. A US Air Force F-16 Fighting Falcon conducts operations over eastern Afghanistan
  22. The Cadet Chapel at the US Air Force Academy in Colorado Springs, Colorado
  23. The Great Salt Desert in Iran
  24. Resuspended sediment off the coast of Tunisia
  25. Dallas Texas
  26. A pilot prepares to dismount his A-10C Thunderbolt II
  27. Swift High Speed Vessel 2 HSV2 sits moored in Pearl Harbor
  28. A Mi17 Hip helicopter hovers over a firing range in Afghanistan
  29. Vintage Travel Poster Of The Decorative Prows Of Gondolas On A Canal In Venice, 1920
  30. Noctis Labyrinthus formation on Mars
  31. Oblique Bermudas eye view of the United States east coast
  32. The aircraft carrier USS Carl Vinson in the Pacific Ocean
  33. Green Berets prepare to board a KC-130 aircraft
  34. Boots, rifle, dog tags, and protective helmet stand in solitude to honor fallen soldiers
  35. Oxia Palus region of Mars
  36. Fantasy: Inspirational Quote and Motivational Poster
  37. USS Carl Vinson and USS Bunker Hill transit the Pacific Ocean
  38. Los Angeles-Class Attack Submarine USS Louisville
  39. Airmen present the American Flag during the National Anthem
  40. A rescue swimmer gets hoisted into an MH-60 Jayhawk helicopter
  41. The aircraft carrier USS John C. Stennis
  42. The U.S. Army Medal of Honor is worn by a retired U.S. Soldier
  43. Medical Illustration Of A Cataract In The Human Eye, Compared To A Normal Eye
  44. A V22 Osprey aircraft landing on the flight deck the USS Bataan
  45. U.S. Army soldier provides security for infantry patrolling through Dandarh village
  46. Cougar HEV Mine Resistant Ambush Protected vehicles
  47. Vintage Travel Poster Advertising Travel By Train To Far West National Parks, 1920
  48. U.S. Marines pivot into position during a live-fire exercise