Nasa's stranded astronauts are finally on their way back home

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A handout screengrab shows a SpaceX Crew Dragon capsule, carrying Butch Wilmore and Suni Williams, and Roscosmos cosmonaut Aleksandr Gorbunov and NASA astronaut Nick Hague, as it manoeuvres in space after undocking from the ISS to begin a journey to return to Earth (left), and the Harmony module of the ISS after the undocking, on Tuesday. Reuters