Watch Alaska Wing Men online: Episode Suicide Sled Race

The Iron Dog is known as the longest, toughest, most extreme snowmobile race in the world. Racers brave wildly dangerous terrain, bitterly cold temperatures, and speeds well over a hundred miles an hour in this two-thousand-mile endurance race. To make their journey possible, the snowmobile racers on the ground rely on their Alaska Wing Men to be their flying "pit-crew."

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