Boeing’s Starliner capsule just returned to Earth without astronauts, marking the beginning of a new set of investigations by NASA. Starliner left the International Space Station (ISS) on Friday evening (Sept. 6), then aced a landing in New Mexico just after midnight on Saturday (Sept. 7). The touchdown brought an end to Crew Flight Test (CFT), Starliner’s first-ever astronaut mission. But no astronauts came down with the capsule on Saturday; Starliner experienced problems with its reaction control system (RCS) thrusters shortly after CFT’s June 5 liftoff, and NASA decided not to risk putting Williams and Wilmore aboard the capsule again.