Two Nasa astronauts were 'stranded' on the ISS due to the failure of Boeing's Starliner capsule, but are now returning to Earth on a SpaceX Dragon capsule after a 17-hour descent.
Sunita Williams and Butch Wilmore stayed on the ISS since June last year to evaluate Starliner, but technical issues led to their extended stay.
The astronauts bid farewell as the capsule undocked from the station, with Nicholas Hague and Aleksandr Gorbunov also aboard.
Amid political controversies involving Elon Musk and claims of abandonment, the astronauts insisted they did not feel stuck or stranded.
The return is scheduled for a splashdown off the Florida coast, with live coverage on Nasa TV and Nasa+.
Boeing's Starliner capsule's future is uncertain due to technical issues, but the company remains confident in its product.
The astronauts' odyssey has been the center of political disputes, with Elon Musk involved in public conflicts with retired astronauts and ISS veterans.
The SpaceX Dragon capsule will bring the astronauts back home after months in space, as they prepare for re-entry into Earth's atmosphere.
Live coverage of the final stages of the descent and crew recovery will be provided by Nasa for the Crew 9 astronauts.
The astronauts, after being part of an international effort in space, are set to splashdown off the Florida coast, with weather conditions being a factor in the return.