In January 1926, six-year-old Richard Stanley showed symptoms of diphtheria, signaling the possibility of an outbreak in the small town of Nome. When the boy passed away a day later, Dr. Curtis Welch began immunizing children and adults with an experimental but effective anti-diphtheria serum. But it wasn't long before Dr. Welch's supply ran out, and the nearest serum was in Nenana, Alaska 1000 miles of frozen wilderness away. Amazingly, a group of trappers and prospectors volunteered to cover the distance with their dog teams! Operatin…