A SpaceX capsule has delivered four astronauts to the International Space Station as part of a NASA crew swap. This will allow Butch Wilmore and Suni Williams to return home after spending nine months on the orbiting lab. 'Barry Wilmore said he was not stranded—his mission was simply extended, and both he and Sunita Williams were prepared for that situation,' explained Olivier Sanguy, Head of Space News at Cité de l'Espace.