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

A three-stage Soyuz booster rocket, capped by a three-person crew transport capsule, rolled out to a launch pad in Kazakhstan on Monday, two days before blasting off with new residents headed for the International Space Station.

SpaceX scrubbed a Falcon 9 launch attempt Thursday, citing an issue associated with the planned recovery of the rocket’s first stage or payload fairing in the Atlantic Ocean. Officials later said the mission would be grounded to await improved weather in downrange recovery area in the Atlantic Ocean.

A Russian Soyuz booster arrived at its launch pad Sunday in Kazakhstan for two days of final countdown preparations ahead of liftoff with a Russian cosmonaut and two U.S. astronauts Tuesday on the way to the International Space Station.