Diggins explains how she became the first American woman to win the overall World Cup in cross-country skiing: "My goal is to be the one... who gives the most", the Olympic champion told us. "You don't have to be from Scandinavia or Russia or any of these countries with a huge history to be able to do well in the sport. You can be from the US or from Canada or from anywhere and still succeed." Find out how she managed it as a 29-year-old in this exclusive interview.