A Crew Dragon spaceship built and owned by SpaceX glided to an automated docking with the International Space Station Sunday, delivering NASA astronauts Doug Hurley and Bob Behnken to the orbiting research complex after a trouble-free 19-hour flight from the Kennedy Space Center.

United Launch Alliance (ULA) is set to roll its Atlas 5 rocket and the Starliner spacecraft back to the Vertical Integration Facility on Wednesday to begin working on the problematic valve. The new launch date is no earlier than Friday, May 17, at 6:16 p.m. EDT (2016 UTC).

Astronauts Doug Hurley and Bob Behnken arrived Wednesday at the Kennedy Space Center, ready for spacesuit and spacecraft fit checks, and some time off with their families before launching next week on the first crewed flight into orbit from U.S. soil since 2011.