One-Year Astronaut Scott Kelly Retires from NASA (Video)

Record-setting NASA astronaut Scott Kelly has handed in his spacesuit. Kelly, who recently wrapped up an unprecedented yearlong mission aboard the International Space Station (ISS) and has spent more total time in space than any other American, officially retired from NASA today (April 1). "When we do things that are really hard, we can achieve great things — and that has worked as a great model for me," Kelly said in the interview, which was conducted March 25 during a trip to Russia to c