The astronauts undocked from the space station to which the Crew Dragon capsule has been attached since April.
The astronauts splashed down off the coast of Florida.
The SpaceX team – Shane Kimbrough and Megan MacArthur from NASA, French astronaut Thomas Pesce from the European Space Agency and Akihiko Hoshide from Japan – are returning to Earth before the next crew of astronauts can reach the ISS.
NASA and SpaceX hope to launch another mission this week.
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