WATCH: NASA returning crew from ISS, cuts space mission short after medical issue

In an unprecedented move, NASA will bring four astronauts – including two Americans – home early from their mission at the International Space Station because of a medical issue with a crew member.

​In an unprecedented move, NASA will bring four astronauts – including two Americans – home early from their mission at the International Space Station because of a medical issue with a crew member.  WNT In an unprecedented move, NASA will bring four astronauts – including two Americans – home early from their mission at the International Space Station because of a medical issue with a crew member.