US Air Force Launches X-37B Space Plane on 4th Mystery Mission

The unmanned X-37B spacecraft launched atop a United Launch Alliance Atlas V rocket today (May 20) at 10:45 a.m. EDT from Florida's Cape Canaveral Air Force Station. The booster also carried the Planetary Society's tiny LightSail to orbit.

via LiveScience.com http://ift.tt/1Lc7ci9