80-G-465361:  MacMillan Arctic Expedition, 1925.  Etah Fjord showing the glacier leading from the ice cap which at sometime several centuries ago extended out to seaward and out the walls of the fjord in the perpendicular condition shown here. This expedition was noted for the first productive use of aircraft in an Arctic exploration by Americans.  The three aircraft were NA-1, NA-2, and NA-3.  (2015/10/27).
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