Video: Trump call to station

In a rapid-fire crew exchange, three space station fliers return to Earth Friday morning, landing on the steppe of Kazakhstan just four days before their replacements blast off from the Baikonur Cosmodrome a few hundred miles away, boosting the lab’s crew back to six.

SpaceX has concluded fatigue on an engine cover caused one of the nine Merlin 1D first stage engines on the company’s most recent launch to shut down early during ascent, leading to the loss of the booster during an offshore landing attempt in the Atlantic Ocean, an official said Monday.

Clad in white spacesuits, astronauts Scott Kelly and Kjell Lindgren recently floated outside the International Space Station on a pair of spacewalks, and the duo carried cameras with them to document the excursions.