Video: Liftoff of Atlas 5 on NROL-55

SpaceX’s first human-rated Crew Dragon spacecraft took off Saturday from historic launch pad 39A at the Kennedy Space Center in Florida, launching NASA astronauts Doug Hurley and Bob Behnken on the first piloted orbital space mission from a U.S. spaceport in nearly a decade.

A replay of the United Launch Alliance Atlas 5 rocket launching the Global Positioning System 2F-11 navigation spacecraft from Cape Canaveral, Florida.

The 330-foot-tall mobile service tower is rolled away from the United Launch Alliance Delta 4 rocket at Cape Canaveral’s pad 37B in the hours before the scheduled liftoff. The 9-million-pound gantry was retracted the length of a football field in preparation for launch of the Air Force’s WGS 9 communications satellite into Earth orbit.