Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

Astronauts Barry “Butch” Wilmore and Terry Virts floated outside the International Space Station Saturday and installed wiring needed for two new docking mechanisms that will be attached later this year for use by Boeing and SpaceX crew capsules.

Two days after launching from Cape Canaveral with nearly 5,500 pounds of supplies and experiments, an automated SpaceX Dragon cargo craft approached the International Space Station Monday. The Dragon supply ship was grappled by the station’s robotic arm at 7:01 a.m. EDT (1101 GMT).

The Russian Progress 58P cargo freighter launches and six hours later docks to the International Space Station.