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  1. Firefighters deploy a fire hose during a drill at Moody Air Force Base
  2. USS Truxtun participates in an underway replenishment with USNS Patuxent
  3. Fully dark city lights image of Earth centered on the South Pole
  4. Microscopic view of inner nervous system
  5. Guided-missile destroyer USS William P. Lawrence departs San Diego
  6. An HH-60 Pavehawk Helicopter Testing The Aircraft's Defensive Systems
  7. Marines fire 9mm handguns on the flight deck of USS Peleliu
  8. The Aegisclass destroyer USS Hopper launching a standard missile 3 Blk IA in Kauai
  9. Global Hawk unmanned aircraft
  10. Peace: Inspirational Quote and Motivational Poster
  11. US Marine sounds a bell honoring fallen Marines during a ceremony
  12. Fireworks light up the night sky above the Lincoln Memorial
  13. Lake Balkhash in eastern Kazakhstan
  14. Humanitarian Aid Loaded By Hawaii Air National Guard Into A C-17 Globemaster III
  15. US Navy Diver welds a repair patch on the submerged bow of the USS Ogden
  16. General Ulysses S. Grant of the Union Army, circa 1860
  17. Solar activity on the Sun
  18. The Military Sealift Command hospital ship USNS Comfort
  19. USS Winston S. Churchill makes a high-speed run in the English Channel
  20. Anatomy of nasal sinuses
  21. Artist's concept of Kepler-186f orbiting a distant star
  22. Andromeda galaxys older stellar population in blue
  23. Saturns moon Dione
  24. A Sikorsky S-61L Mk II helicopter taxis on the runway during sunrise
  25. An F-22 Raptor in flight over the Hawaiian Islands
  26. Diagram illustrating muscle groups on front of human legs
  27. Satellite view of Hurricane Irene over the Bahamas
  28. Conceptual image of platelet, red blood cell and white blood cell
  29. A United Launch Alliance Delta II rocket lifts off from its launch complex
  30. A U.S. Air Force pararescueman jumps out of an HC-130P Combat King aircraft
  31. Satellite view of Hurricane Irene approaching the Bahamas
  32. The Blue Angels perform aerial demonstrations during an air show
  33. US Army nurses pull into port of Greenock, Scotland, circa 1944
  34. A C-130H Hercules gets ready to support Hurricane Harvey relief efforts
  35. The boosters of the Soyuz TMA14 spacecraft
  36. Space Shuttle Discovery resting on the Mobile Launcher Platform
  37. Members of the US Navy Parachute Team the Leap Frogs perform a biplane
  38. An M88A2 Hercules Recovery Vehicle
  39. An EA-6B Prowler takes off from the aircraft carrier USS Enterprise
  40. Enhanced color view of planet Jupiter's stormy atmosphere
  41. Air Department crewmembers remove slot seal from a catapult aboard USS George Washinton
  42. Paratroopers Wait To Board A UH-60 Black Hawk For A Jump Exercise
  43. An MH-60S Sea Hawk helicopter delivers cargo to USS Mobile Bay
  44. An AH-1W Super Cobra helicopter launches off the flight deck of USS Peleliu
  45. Vintage Ringling Brothers Circus Poster Of Madam Ada Castello On A Rearing Horse, 1899
  46. A Landing Craft Air Cushion exits the well deck of USS Bonhomme Richard
  47. The Global Hawk unmanned aircraft
  48. The Hubble Space Telescope in orbit above Earth