An unidentified US Army ski troopers, in a fur-lined white parka, lies in the snow and aims his rifle during training exercises, Colorado, 1942. (Photo by The Frank S. Errigo Archive/Getty Images)
An unidentified US Army ski troopers, in a fur-lined white parka, lies in the snow and aims his rifle during training exercises, Colorado, 1942. (Photo by The Frank S. Errigo Archive/Getty Images)