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This photo released by Vandenberg Air Force Base on Monday shows the X-37B Orbital Test Vehicle, the Air Force's unmanned, reusable space plane, after it landed at Vandenberg from a previous orbital mission.
October 14, 2014 There are many theories about what exactly the unmanned X-37B is doing as it circles the Earth on long-duration missions.
Atlas V (left); Falcon 9 (right)
May 12, 2014 The California-based maker of the Falcon 9 is hoping to break up a monopoly on the launch market for national security satellites.
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