Ultrarunning champion Scott Jurek on his best-selling new book, "Eat & Run: My Unlikely Journey to Ultramarathon Greatness"

Buck spoke July 13 with elite athlete & vegan Scott Jurek on his new best-selling book, "Eat & Run," about his journey from a northern Minnesota childhood to winning the most grueling competitions--on a plant-based diet. Scott recently set a new American record by running 165.7 miles in 24 hours—that's 6.5 marathons in one day.