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

Crew Dragon astronauts Douglas Hurley and Robert Behnken thanked their space station crewmates for a productive two-month visit, readied their SpaceX capsule for departure and stood by for a final “go” from flight controllers to undock Saturday night, setting up a Gulf of Mexico splashdown Sunday afternoon.

NASA and SpaceX officials briefed the media Wednesday on the planned launch of a Falcon 9 rocket and Dragon cargo capsule on a resupply flight to the International Space Station.

Astronauts Randy Bresnik and Mark Vande Hei headed outside the International Space Station Thursday on a spacewalk to replace one end of the lab’s Canadian-built robotic arm, a changeout that engineers say will restore the device to full capability.