Live coverage: SpaceX supply ship returns to Earth

SpaceX rolled the first Crew Dragon spacecraft out to a Florida launch pad Thursday for final preparations ahead of a test flight to the International Space Station.

The U.S. Air Force’s fourth new-generation SBIRS missile warning satellite is headed for geosynchronous orbit after lifting off from Cape Canaveral at 7:48 p.m. EST Friday (0048 GMT Saturday), after a one-day delay caused by a troublesome fill-and-drain valve.

SpaceX has launched its third Falcon 9 of the year. The rocket is carrying a pair of communications payloads for Eutelsat and Asia Broadcast Satellite.