Video: Change of command aboard International Space Station

The quartet is set to liftoff from Launch Complex 39A at NASA’s Kennedy Space Center on Thursday, July 31. Their Dragon spacecraft, Endeavour, will fly for a record-setting sixth time.

Nearly a decade in the making, NASA and SpaceX have set May 27 as the target launch date for the first crewed space mission to launch into orbit from U.S. soil since the retirement of the space shuttle in 2011.

A commercial Dragon cargo craft launched June 29 departed the International Space Station and returned to Earth on Friday with nearly two tons of cargo and research samples.