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US mini space shuttle returned after 468-day flight.
Having performed a15-month clandestine military mission, the Pentagon's miniature spaceplane, one quarter the size of NASA's now-retired space shuttle, returned to Earth on June 16, 2012. X-37B Orbital Test Vehicle 2 landed at Vandenberg Air Force Base at 12:48 UTC. The base is located on California's Central Coast about 150 miles northwest of Los Angeles.