Video: Soyuz launcher ready for rollout

Concern about a possible ammonia coolant leak Wednesday prompted astronauts on the International Space Station to evacuate the U.S. segment of the complex and shelter in the Russian portion of the outpost while flight controllers scrambled to untangle initially confusing telemetry.

Three crew members departed the International Space Station on Wednesday and descended back to Earth, touching down in Kazakhstan aboard the Soyuz TMA-14M capsule at 10:08 p.m. EDT (0208 GMT Thursday).

NASA space station managers decided Thursday to delay the first two of three planned spacewalks by one day to give flight controllers and engineers a chance to catch their collective breath after exhaustive troubleshooting to verify the health of critical internal spacesuit components.