 The two astronauts were only supposed to be gone for about a week after taking off on June 5th, but as their spacecraft has encountered mechanical issues, they've yet to return home. I want to reiterate and remind folks that Starliner is really designed for a 210-day mission. NASA's Steve Stich says they're in no rush. Starliner remains available in cases of an emergency or a contingency on the space station where the crew would have to return very quickly back to Earth.