US Air Force’s Secretive X-37B Space Plane [Infographic]

The X-37B is an unmanned space test vehicle for the United States Air Force, based on NASA’s original X-37 design. It is a lot smaller than the Space Shuttle and is launched via an Atlas V booster. The first test flight was in April 2010, followed by a second test flight, using a second vehicle – the Orbital Test Vehicle 2 – launched in March 2011. Here are the basic facts of the X-37B robotic space plane:

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