Photos: X-37B gallery archive

All systems are now “go” for launch of the Air Force’s X-37B mystery spaceplane on May 20 from Cape Canaveral aboard an Atlas 5 rocket.

United Launch Alliance technicians positioned the first stage for the next Atlas 5 rocket on a mobile launch platform Friday at Cape Canaveral, a key step in preparations for an October mission that will debut a new solid-fueled booster design.

Boeing’s first Starliner spacecraft designed to fly to the International Space Station rolled out of a converted space shuttle hangar before dawn Thursday.