This is the second Boeing X-37B, the Orbital Test Vehicle 2 (X-37B OTV-2), an American unmanned robotic vertical-takeoff, horizontal-landing spaceplane. It was launched aboard an Atlas V rocket from Cape Canaveral on March of 2011, and is currently being operated in low Earth orbit. Its mission designation is part of the USA series.
The spaceplane is operated by the United States Air Force, which has not revealed the specific identity of the payload for the first flight. The Air Force has stated only that the spacecraft will "demonstrate various experiments and allow satellite sensors, subsystems, components, and associated technology to be transported into space and back."

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