In the winter of 1925, an outbreak of diphtheria broke out in Nome, Alaska. With the shipping port frozen over, Nome was isolated in northwest Alaska and without a vaccine, the town could have been wiped out. Fortunately, a vaccine was available in Anchorage but the train line towards Nome still left them over 600 miles away.
It was then decided that dog sled teams would be used to traverse the remaining distance and over the course of 6 days, 20 mushers and 150 dogs raced to bring the vaccine to Nome and save the town from a disastrous epidemic. Today, the Iditarod Trail Sled Dog Race ends in Nome to commemorate the bravery showed by both man and dogs to traverse dangerous conditions to save the people of Nome.