text:  Boeing and NASA say this gives engineers time to study the problems in the ship's service module. It's important to do it now because it's jettisoned and burns up when the astronauts return to Earth. Both Boeing and NASA say astronauts Sonny Williams and Butch Wilmore could come back in an emergency. They're happy to get the extra time in orbit. Peter King, CBS News. Presidential timepiece is back where it belongs.