Video: Change of command aboard International Space Station

Two veteran NASA astronauts rocketed away from the Kennedy Space Center in Florida on Saturday to begin a test flight of a new commercial spaceship designed, built and owned by SpaceX.

A week after a test-firing of SpaceX’s new crew capsule went awry, SpaceX successfully completed a hold-down firing of its next Falcon 9 launcher Saturday morning at Cape Canaveral in preparation for a predawn liftoff Wednesday carrying several tons of food, supplies and experiments to the International Space Station.

An all-veteran crew of four astronauts jetted into NASA’s Kennedy Space Center Friday for the final few days of rehearsals, briefings, and relaxation before blasting off Thursday bound for a six-month stint on the International Space Station.