Video: Change of command aboard International Space Station

An Antares rocket is being prepared for launch for the first time in two years after emerging from the Horizontal Integration Facility at Wallops Island, Virginia, on Thursday evening for a one-mile trip to the launch pad.

A SpaceX Dragon supply ship packed with nearly three tons of experiments, crew provisions and supplies will remain on the ground until at least Friday morning to allow more time for NASA flight controllers to troubleshoot a problem with an electrical distribution unit on the International Space Station.

A Russian Progress resupply and refueling craft launched Monday from the Baikonur Cosmodrome in Kazakhstan, riding a Soyuz booster into orbit on a perfectly-timed departure that set the stage for an on-target docking with the International Space Station less than four hours later.