Live video of the docking of a Progress cargo ship with the space station

In a major shakeup at NASA Headquarters, agency Administrator Jim Bridenstine said Wednesday that Bill Gerstenmaier, the widely respected director of human spaceflight, has been replaced in the midst of an ambitious push to meet the Trump administration’s directive to send astronauts back to the moon within five years.

Orbital ATK’s Antares rocket returned to flight Oct. 17 with a successful evening launch from Virginia’s Eastern Shore, a beacon visible for hundreds of miles along the U.S. East Coast as the 13-story rocket set course for a cargo delivery to the International Space Station.

Orbital ATK’s Antares rocket will deliver the commercial Cygnus supply ship to an orbit with an altitude between 117 miles (189 kilometers) and 184 miles (296 kilometers) within about nine minutes of liftoff Saturday from Virginia’s Eastern Shore.