Video: CATS out of the bag

Astronauts on the International Space Station are eager to begin unpacking 2.6 tons of supplies and experiments — including a package of belated Christmas gifts — after delivery aboard a SpaceX Dragon cargo capsule Monday.

SpaceX is counting down to liftoff Saturday of a Falcon 9 rocket with a commercial cargo craft heading for the International Space Station after engineers replaced a component in an upper stage steering system that grounded the launcher Tuesday.

SpaceX’s Dragon supply ship wrapped up a 29-day stay at the International Space Station on Tuesday, departing the complex with nearly 3,700 pounds of research specimens, a balky spacesuit and experimental 3D printed parts before re-entering the atmosphere and splashing down in the Pacific Ocean.