Four space station fliers have been told to cut their mission short and return to Earth ahead of schedule because of an apparently serious medical issue affecting an unidentified crew member, NASA ann...

A crew member aboard the International Space Station has a medical issue that forced postponement of today's two-astronaut spacewalk — and NASA is considering sending the Crew-11 astronauts home earli...

NASA’s chief health and medical officer, James “JD” Polk, said the affected astronaut is “absolutely stable” and that this isn’t a case of an emergency evacuation.