A replacement crew is heading to the ISS, and Suni Williams and Butch Wilmore will come home at last. But first, another delay.

The launch of the NASA-SpaceX Crew-10 mission meant to pave the way for the return of pair of astronauts stranded on the International Space Station was postponed Wednesday, the US space agency said.

The next available launch opportunity is no earlier than 7:26 pm EDT on Thursday, from Launch Complex 39A at NASA Kennedy pending review of the issue, according to the statement released by NASA.