The Space X Crew Dragon is undocking from the International Space Station, carrying two US astronauts back to Earth on Sunday. Undocking is expected to take place on 23:34 GMT.
Bob Behnken and Doug Hurley arrived to the ISS on the same space vehicle they are now boarding to return to Earth.
In late May, a Space X Crew Dragon capsule marked the first US space launch in a decade, since the suspension of the Space Shuttle Program.
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