Photos: Launch boosts satellite for U.S. allies

Christopher Ferguson, commander of the final space shuttle flight and now a Boeing executive, has stepped down as commander of the first piloted test flight of the company’s troubled CST-100 Starliner commercial spacecraft, he and Boeing announced Wednesday. He has been replaced by NASA astronaut Barry “Butch” Wilmore.

The 8-million-pound mobile service tower is retracted from around the Atlas 5 rocket, revealing the 19-story-tall vehicle for liftoff from Vandenberg Air Force Base, California, on NROL-55.

Resembling a cocooned insect with antennas and appendages tucked snuggly to its body for launch, NASA’s latest communications relay hub will be shot into space Friday to blossom in geosynchronous orbit for routing signals to and from the International Space Station, the Hubble Space Telescope and three dozen science observatories.