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Plot: From John Muir in the 1860s to today's super-athletes, Vertical Frontier tells the rich and captivating saga of these free-spirited climbers whose contributions to the techniques, equipment, and ethics of mountaineering enabled them to be the first to conquer Yosemite's legendary big walls. Illustrated with spectacular footage, both old and new, shot on these granite walls, the story is told by the climbers whose artistry and relentless determination helped launch a sport now enjoyed by millions around the world, including David Brower, Warren Harding, Royal Robbins, Yvon Chouinard, Tom Frost, Jim Bridwell, Lynn Hill, Hans Florine, Dean Potter, and many others