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.

NASA and SpaceX on Friday will count down to a long-awaited crewed rocket launch that will allow them to bring home U.S. astronauts Butch Wilmore and Suni Williams, who have been stuck on the International Space Station for nine months.