Video: U.S. military's unmanned X-37B robotic space shuttle returns to Earth:

The U.S. military's unmanned X-37B robotic space shuttle returns to Earth after spending 15 months in Space orbiting the planet. Capping a 15-month clandestine military mission circling the planet, the Pentagon's miniature spaceplane, one quarter the size of NASA's now-retired space shuttle, returned to Earth just after dawn Saturday, June 16, for a pinpoint touchdown at Vandenberg Air Force Base. Video: 30th Space Wing Public Affairs, VAFB.

Unmanned X-37B Military mini-shuttle returns from top secret mission