On the evening of March 17, 1959, as the people of Tibet braced for a violent power grab by Chinese occupiers--one that would forever wipe out any vestige of national sovereignty--the twenty-four-year-old Dalai Lama, Tibet's political and spiritual leader, contemplated the impossible. The task before him was immense: to slip past a cordon of crack Chinese troops ringing his summer palace and, with an escort of 300, journey across the highest terrain...