What Will the X-37B Military Space Plane Do on Its Next Mystery Mission?

On Wednesday, the United States Air Force's Rapid Capabilities Office is set to launch the fourth mission of the X-37B Orbital Test Vehicle — the military's secretive robotic space plane. The reusable, unmanned X-37B spacecraft will blast off atop a United Launch Alliance Atlas V booster tomorrow (May 20) at 10:45 a.m. EDT (1445 GMT) from Cape Canaveral Air Force Station in Florida. You can see a video of how the X-37B will launch. Since April 2010, two X-37B vehicles have chalked up a total of 1,367 days in space on three different missions. On the last flight, which launched in December 2012 and landed this past October, the X-37B set the record for longest mission of a reusable space vehicle: 674 days. More

(Source: Space.com - May 20)