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.

SpaceX will try again Friday evening to launch the replacement crew to the International Space Station where the pair of NASA astronauts who flew up last summer on Boeing’s Starliner have

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