NASA and SpaceX on Friday launched a long-awaited crew to the International Space Station that opens the door to bringing home U.S. astronauts Butch Wilmore and Suni Williams, who have been stuck on the orbital lab for nine months.

SpaceX launched a crewed NASA mission on Friday to return two astronauts from the International Space Station, after technical issues with Boeing’s spacecraft extended their stay for nine months, leading SpaceX CEO Elon Musk and President Donald Trump to suggest they were stranded for “political reasons.”

SpaceX aims to launch Crew-10 on Friday. The crew-swap mission will enable NASA’s Butch Wilmore and Suni Williams to return home from the International Space Station.