Live coverage: Cygnus supply ship arrives at space station

United Launch Alliance called off the planned launch of an Atlas 5 rocket Wednesday at Cape Canaveral to resolve a problem with valves at the launch pad, while a SpaceX team a mile-and-a-half to the south readied a Falcon 9 rocket for liftoff Thursday evening with a GPS navigation satellite for the U.S. military.

NASA’s InSight Mars lander will be buttoned up for launch in the coming weeks at Vandenberg Air Force Base in California, in preparation for its hoisting atop an Atlas 5 rocket for blastoff in the predawn hours of May 5.

A U.S.-Russian-Italian space crew closed out a 199-day expedition on the International Space Station with a parachute-assisted landing Thursday on the steppe of Kazakhstan. Touchdown of the Soyuz TMA-15M spacecraft occurred at 1343 GMT (9:43 a.m. EDT).