Video: Change of command aboard International Space Station

SpaceX’s Falcon 9 rocket and Crew Dragon Endeavour spacecraft rolled out to pad 39A at NASA’s Kennedy Space Center on Friday. Hydraulics raised the 215-foot-tall rocket vertical on the historic launch pad in preparation for liftoff with four astronauts heading for the International Space Station.

Orbital ATK transferred an Antares rocket and Cygnus supply ship to their launch pad on Virginia’s Eastern Shore late Thursday for a liftoff now targeted for Monday with nearly 7,400 pounds of cargo heading for the International Space Station.

NASA launch commentator George Diller called the Atlas 5 with Cygnus, his final liftoff as the voice of launch control before retirement next month. He has worked at the Kennedy Space Center for nearly four decades and served as the commentator for such memorable launches as Hubble, Cassini, Mars Pathfinder, the Spirit, Opportunity and Curiosity rovers and the final space shuttle mission.