Four astronauts from four countries caught a lift back to Earth with SpaceX on Tuesday to end a half-year mission at the International Space Station.

Their capsule streaked across the U.S. in the predawn darkness and splashed into the Gulf of Mexico near the Florida Panhandle.

NASA's Jasmin Moghbeli, a Marine helicopter pilot, led the returning crew of Denmark's Andreas Mogensen, Japan's Satoshi Furukawa and Russia's Konstantin Borisov.

They moved into the space station last August. Their replacements arrived last week in their own SpaceX capsule.