SpaceX will launch 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.

The NASA and SpaceX mission is on track to launch NASA's Crew-10 mission to the Space Station Friday night at 7:03 p.m. Stranded astronauts Suni Williams and Butch Wilmore head back to Earth Wednesday.

The flight was scrubbed on Wednesday night, and the astronauts will return to the launchpad for their trip to the International Space Station.