Balto, a Siberian Husky, led the 1925 Serum run in Alaska. With all modes of transport suspended in the biting Alaskan winter, Balto and the sled dogs were the only hope for the people of Nome for transporting a serum. This was the only antidote that saved them from a deadly Diphtheria outbreak. Led by Gunnar Kaasen, the pack successfully completed the journey in pitch darkness and near whiteout conditionsš