Live coverage: New crew arrives at International Space Station

SpaceX is on schedule to fly two NASA astronauts on a test flight to the International Space Station by the end of 2017, but there is a lot of work to do to ensure the company’s new Crew Dragon spaceship is up to the task and ready in time, a SpaceX manager said Tuesday.

A Russian commander, his NASA co-pilot and the first Emirati to fly in space returned to Earth Thursday with a fiery re-entry inside the Soyuz MS-12 spacecraft on the way to an on-target parachute-assisted landing in Kazakhstan at 6:59 a.m. EDT (1059 GMT), a few hours after undocking from the International Space Station.

The first launch from Russia’s new cosmodrome in the country’s Far East will not occur until at least early 2016, Russian President Vladimir Putin announced last week, in a widely-anticipated delay after reports of botched construction and corruption beleaguering the spaceport project.