Live coverage: International Space Station crew lands in Kazakhstan

The launch for the second Falcon Heavy rocket from the Kennedy Space Center in Florida has slipped until Wednesday at the earliest. The powerful rocket is due to carry the Arabsat 6A communications satellite into orbit.

A Proton rocket launched from the Baikonur Cosmodrome in Kazakhstan with the EchoStar 21 communications satellite Thursday, the heaviest commercial payload ever flown aboard a Russian booster.

SpaceX’s Crew Dragon spacecraft closed out a six-day test flight in low Earth orbit Friday with an on-target splashdown in the Atlantic Ocean, and officials hailed the ship’s performance before it flies with astronauts for the first time later this year.