More Spying: Air Force's X-37B Space Plane Launching on Secret Mission Friday

"The U.S. Air Force's secretive X-37B space plane is poised to launch on its second mission Friday (March 4), though what exactly it will be doing once it leaves the ground remains a mystery."

http://www.space.com/11006-air-force-x37b-space-plane-secret-launch.html