Two Americans and astronauts from Japan and Russia landed in a SpaceX capsule in the Pacific Ocean after a medical issue prompted NASA to move up their return to Earth.

Four crewmembers aboard the International Space Station were set to depart Wednesday after a medical issue prompted their mission to be cut a month short -- a first for the orbiting laboratory.

This was the first time in the 25-year history of astronauts living on the International Space Station that someone had to return to Earth because of a health issue.