NASA's Commercial Crew Program is overseeing a role swap between two missions onboard the International Space Station. Crew-13 is currently onboard, and after the switch, Crew-12 is expected to return to Earth.

The role reversal will take place before Crew-12's departure, which could happen as early as Monday.

Further information about the mission and the role swap is available from the source, providing additional details about the Commercial Crew Program and the activities of Crew-12 and Crew-13 onboard the ISS.