If anyone hasn't seen it, "Treasure of the Humboldt Glacier" is a documentary about Darryl Greenamyer's ill-starred attempt to recover the B-29 "The Kee Bird" from somewhere NE of Thule in Greenland. Some great Caribou action in it, used to airlift supplies, B-29 engines and spares and other essential kit into the site, a good illustration of the type's ruggedness.