In 1993 Greg Mortenson was the exhausted survivor of a failed attempt to ascend K2, an American climbing bum wandering emaciated and lost through Pakistan’s Karakoram Himalaya. After he was taken in and nursed back to health by the people of an impoverished Pakistani village, Mortenson promised to return one day and build them a school. From that rash, earnest promise grew one of the most incredible humanitarian campaigns of our time—Greg Mortenson’s one-man mission to counteract extremism by building schools, especially for girls, throughout the breeding ground of the Taliban.