Every year on the first Saturday of March mushers set out from Anchorage Alaska to compete in the Iditarod Sled Dog Race on a 1,000 mile quest to be the first team to reach the gold mining town of Nome. At least one in every five will quit. For those powered by their dream to succeed, they will face numbing cold, negotiate broken sea ice, brave blizzards, cross mountains, navigate snow covered trails over hundreds of miles of wilderness, and face...