Williams and Wilmore flew to the ISS aboard the Boeing Starliner's first crewed flight meant to prove its readiness to ferry astronauts to orbit. On the way to the station, however, the Starliner started leaking helium, and some of its thrusters had malfunctioned. While the astronauts and ground engineers tried to solve the issue, NASA had ultimately decided to have the Starliner fly back home uncrewed. The spacecraft returned back to Earth in September, leaving Williams and Wilmore aboard the ISS.
Before Boeing's Starliner flew back, NASA had already decided that Williams and Wilmore will be coming home with the SpaceX Crew-9 personnel. The mission headed to the station with only two astronauts onboard to leave two seats open for its return. They were originally scheduled to fly back in February, but Crew-10's launch was ultimately delayed to give SpaceX enough time to process a new Dragon spacecraft for the mission. Williams and Wilmore are now expected to fly back to Earth with Crew-9's Nick Hague and Aleksandr Gorbunov as soon as March 19.
Source: www.engadget.com
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