AVweb For more than five days in January of 1925, 20 mushers and 150 sled dogs led a relay across 674 miles of the Iditarod Trail in a desperate race to save the community of Nome, Alaska, whose residents were suffering and dying in a severe diphtheria outbreak. Today, we hear echoes of that legendary Serum Run as Operation Warp Speed delivers COVID-19 vaccine to people around the world. Every day, aircrews and aircraft leverage airports large and small to serve as critical elements of the most complex logistics chain in history to help end the pandemic. The story of that mission made heroes of man and dog for generations.