Nasa astronauts Sunita Williams and Butch Wilmore are set to undock from the International Space Station (ISS) on Tuesday, marking the end of an extraordinary nine-month journey in space.
Their mission, initially planned as a brief eight-day test flight aboard Boeing's Starliner spacecraft, was extended due to unforeseen technical issues with their vehicle.
Williams is returning aboard SpaceX Dragon spacecraft with Willmore and two other Crew-9 members.
The astronauts have been on the ISS since June last year, following the maiden crewed mission of the Boeing Starliner spacecraft, which encountered technical issues and was deemed unfit for their return journey.
The Starliner's propulsion problems necessitated an alternative plan, leading to their inclusion in the Crew-9 mission.
