The Dog Sled Relay in Alaska

The dog sled relay from nanana to nome became known as the great race of mercy. 300 thousand units of serum from the alaska railroad hospital departed anchorage by train. Another million units were on the way, but it was going to take a lot longer for them to arrive. The only airplanes available were of the open cockpit variety and they would have to be flown in 50 degrees below zero temperatures in a blizzard.