80-G-465368:  MacMillan Arctic Expedition, 1925.  An iceberg near Godhaven, Greenland, September 1925. 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).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
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