Former NASA Astronaut Tom Jones

NASA Astronaut Scott Kelly is back on Earth after spending a full year on the International Space Station. Kelly and his Russian counterpart Mikhail Kornienko will be studied so scientists can get a better idea of what happens to human beings in zero gravity for long periods of time, in preparation for future missions to Mars and other destinations in deep space. Former NASA Astronaut Tom Jones, author of the new book “Ask An Astronaut” joined John to talk about what it’s like coming back from a long stay in space.