Half a century after Northwest Airlines Flight 4422 slammed into the side of 4,950-meter Mount Sanford in eastern Alaska's Wrangell Mountains, killing all 30 men on board, commercial pilots Kevin McGregor and Marc Millican found the wreckage embedded in a glacier. After searching fruitlessly for the debris from the air, McGregor and Millican undertook several arduous treks on foot on the glacier
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