Video: Change of command aboard International Space Station

A United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 11:05 p.m. EDT (0305 GMT) tonight to send Orbital ATK’s commercial Cygnus cargo freighter to the International Space Station. Follow the mission in our live journal.

Concern about a possible ammonia coolant leak Wednesday prompted astronauts on the International Space Station to evacuate the U.S. segment of the complex and shelter in the Russian portion of the outpost while flight controllers scrambled to untangle initially confusing telemetry.

An upgraded Soyuz spacecraft, featuring improved navigation, communications and rendezvous systems, blasted into orbit from Kazakhstan Wednesday and set off on a two-day maiden flight to deliver three fresh crew members to the International Space Station.