Live coverage: 400th Proton rocket takes off with Russian satellite

Two NASA astronauts and an Italian flight engineer took shelter in the space station’s Russian segment Wednesday as mission control analyzed a possible leak of toxic ammonia coolant aboard the complex. Initial data indicated it was likely a false alarm.

An automated logistics vehicle packed with nearly five tons of supplies reached the International Space Station on Monday after a laser-guided rendezvous culminating with grapple of the HTV cargo craft by the station’s robotic arm at 1028 GMT (6:28 a.m. EDT).

Russia’s Proton rocket returned to flight Friday with the successful deployment of a powerful new communications satellite for Inmarsat of London in the workhorse rocket’s first flight since a launch failure in May.