After 93 days Nasa's troubled Starliner setting stage for unpiloted return to Earth

Boeing's Starliner capsule is set to undock from the International Space Station on September 6, landing in New Mexico six hours later. Astronauts Butch Wilmore and Sunita Williams will remain on the ISS until February, returning aboard a SpaceX Crew Dragon ferry ship. The mission encountered helium leaks and thruster issues but...