Book excerpt: In the summer of 1967, twelve young men ascended Alaska’s Mount McKinley—known to the locals as Denali. Engulfed by a once-in-alifetime blizzard, only five made it back down. Andy Hall, a journalist and son of the park superintendent at the time, was living in the park when the tragedy occurred and spent years tracking down rescuers, survivors, lost documents, and recordings of radio communications. In Denali’s Howl, Hall reveals the full story of the expedition in a powerful retelling that will mesmerize the climbing community as well as anyone interested in mega-storms and man’s sometimes deadly drive to challenge the forces of nature.