Atlas 5/Cygnus NASA TV broadcast

Air Force ground controllers have activated service aboard the newest Global Positioning System satellite, achieving that milestone for the final spacecraft in a dozen built in a manufacturing batch to update the constellation.

With its new homeport in renovated NASA space shuttle hangars off in the distance, the Air Force’s X-37 mini spaceplane will be launched from Cape Canaveral on May 6 for its fourth journey into orbit.

Watch the pre-launch news conference held Monday, March 21 at NASA’s Kennedy Space Center to preview liftoff of the Orbital ATK commercial Cygnus cargo ship aboard a United Launch Alliance Atlas 5 rocket for the International Space Station.