Photos: Atlas 5 rocket soars from West Coast

SpaceX technicians at Cape Canaveral are readying for the first launch of an upgraded Falcon 9 rocket configuration next week, a mission that will debut changes to make the launcher safer for astronauts and make it easier — and less expensive — for the company to reuse first stage boosters.

The mobile service tower retracts from the Atlas 5 rocket, revealing the 191-foot-tall vehicle for liftoff from Vandenberg Air Force Base, California, carrying the classified NROL-79 national security payload for the U.S. government.

The enigmatic X-37B spaceplane, launched into low-Earth orbit on an experimental military mission in 2015, continues to circle the planet despite a flurry of landing rumors.