NASA/Bill Ingalls
- US astronaut Frank Rubio landed back on Earth Wednesday after 371 days in space.
- He was meant to only spend half that time in space, but was stranded by a technical failure.
- He "probably would have declined" the mission had he known its true length, he said.
US astronaut Frank Rubio became an unwilling record-holder after spending 371 days on the International Space Station (ISS), the longest time spent on a single spaceflight by any NASA astronaut.