Secret U.S. Military Spy Plane Rockets Into Orbit

May.19 -- The US military’s mystery space plane rocketed into orbit again on Sunday, this time with an extra load of science experiments. The X-37B was launched on board a United Launch Alliance Atlas 5 rocket from Cape Canaveral in Florida. It will be the sixth flight of the X-37B, a solar-powered plane that's flown by remote control without a crew. (Source: United Launch Alliance)