Time-lapse: The Falcon 9 and Crew Dragon roll to the launch pad (members only)

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.

Arianespace will convene an independent inquiry board chaired by a top European Space Agency official to investigate why an Ariane 5 rocket flew off course Thursday night after liftoff from French Guiana with the SES 14 and Al Yah 3 telecom satellites, but both payloads will be salvaged to accomplish their planned missions, officials said Friday.

This is the launch highlights reel from United Launch Alliance of the Atlas 5 rocket carrying the fourth mission of the Air Force’s X-37B spaceplane.