Q&A with Mark Mulqueen, Boeing’s space station program manager

A replay of the United Launch Alliance Delta 4 rocket launching the Air Force’s Wideband Global SATCOM communications satellite No. 7 from Cape Canaveral, Florida.

A Northrop Grumman Cygnus cargo freighter departed the International Space Station Wednesday after delivering more than 7,800 pounds of equipment and experiments, heading for an extended mission with payloads to study fire behavior in microgravity and test a next-generation radio system.

Space station commander Jeff Williams and flight engineer Kate Rubins completed a smooth 6-hour 48-minute spacewalk Thursday, retracting a spare cooling radiator, installing two high-definition TV cameras and inspecting a massive solar array rotation mechanism that has experience subtle vibrations in recent months.