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.

A decommissioned missile originally built in Russia to deliver nuclear weapons to intercontinental targets in the United States vaulted out of a vertical canister Friday and fired into space with a European satellite to monitor global air pollution.

Russia launched a Soyuz rocket Sunday through a veil of fog over the Baikonur Cosmodrome in Kazakhstan, carrying the first spacecraft in a new program to monitor Arctic weather systems and relay emergency communications.