Nothing is quite so awe inspiring, or inhospitable to humans as the world's tallest mountains. Journey to the European Alps, the Himalaya, the Karakoram Range, and the polar region of North America with one of the world's great climbers and discover how mountaineers reached the top of five of the world's highest mountains for the first time. Meet the pioneers who braved incredible dangers like rock falls, crevasses, whiteouts, and avalanches to summit...