Air Force sends Boeing's mystery shuttle back to space

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Secret Space Plane
  • X-37B launch
  • X-37B launch
  • X-37B launch
  • X-37B
  • Secret Spaceplane
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  • Secret Space Plane
Secret Space Plane
A United Launch Alliance Atlas V rocket stands ready for launch on the Complex 41 pad at the Cape Canaveral Air Force Station, Monday, Dec. 10, 2012, in Cape Canaveral, Fla. The Atlas V rocket, scheduled to launch on Tuesday, will deploy the U.S. military's X-37B, a prototype spaceplane also called the Orbital Test Vehicle.(AP Photo/John Raoux)