1943: Five Army aviators left Alaska's Ladd Field on a routine flight to test their hastily retrofitted B-24 Liberator in harsh winter conditions. The mission ended in a crash that claimed all but one-Leon Crane. With little more than a parachute for cover and an old Boy Scout knife in his pocket, Crane now found himself alone in subzero temperatures. Crane knew that his chance of survival dropped swiftly with each passing day. This is his story.