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:

The x-37B Orbital Test Vehicle is an unmanned space test vehicle for the USAF.

Source Space.com: All about our solar system, outer space and exploration