Live coverage: Veteran three-man crew docks with space station

In parallel with an on-going failure investigation, SpaceX is readying downstream Crew Dragon spacecraft for flight in hopes that corrective actions can be implemented in time to launch two astronauts to the International Space Station before the end of the year, a senior NASA manager said Tuesday.

Veteran Russian cosmonaut Oleg Kononenko, flanked by Japanese flight engineer Kimiya Yui and NASA astronaut Kjell Lindgren, boarded a Soyuz landing craft Friday and made a parachute-assisted touchdown in Kazakhstan at 1312 GMT (8:12 a.m. EST) to close out more than 141 days on the International Space Station.

In the run up to what may be the final flight of a Zenit launcher, a Russian-Ukrainian creation that ushered in a new era of Soviet-era rocketry, ground crews transferred the powerful booster to a launch pad Wednesday at the Baikonur Cosmodrome.