Willi Unsoeld became an international hero during the Kennedy years, when he emerged as probably the greatest American climber of the Himalayan golden age. Displaying the sort of vigor that President Kennedy so admired, Unsoeld became the most visible hero of an ascent of Everest's previously-unclimbed West Ridge - an ascent that cost him parts of both feet and nearly his life.His casual fearlessness and physical power established the template for...