Rescue attempt at 19,700 Feet: flying near the altitude limitations of his helicopter, Lt. Col. Madan homes in on a Kool-Aid "X" and Ed Viesturs' makeshift wind sock just above the icefall hoping to evacuate Beck Weathers and "Makalau Gau".

Find this and other spectacular pictures from the expedition in "Everest: Mountain Without Mercy" published by National Geographic. For more information, link to National Geographic on our "Links and Merchandise" page.

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