At 28,251 feet, the world's second-tallest mountain, K2 thrusts skyward out of the Karakoram Range of northern Pakistan. Climbers regard it as the ultimate achievement in mountaineering, with good reason. Four times as deadly as Everest, K2 has claimed the lives of seventy-seven climbers since 1954. In August 2008 eleven climbers died in a single thirty-six-hour period on K2-the worst single-event tragedy in the mountain's history and the second-worst in the long chronicle of mountaineering in the Himalaya and Karakoram ranges. Yet summiting K2 remains a cherished goal for climbers from all over the globe.