In 1978, Reinhold Messner and his climbing partner, Peter Habeler, stunned the world by reaching the summit of Mt. Everest without using bottled oxygen.  When asked why he would attempt climbing Everest without oxygen -- something that was unimaginable at the time -- Messner answered, "I'm doing this for knowing myself.  If I put some important technical thing between me and the mountains, I will never have the possibility to know myself, to explore myself."    He returned to Everest two years later and climbed it again without using supplemental oxygen, but this time alone; and he went on to become the first to summit all 14 of the world's 8,000-meter peaks without using oxygen.    In this exclusive documentary, the first on Messner since Werner Herzog's "Dark Glow of the Mountains" in 1984,  he looks back over his career with surprising candor and personal revelation.    It is the career of a man who began climbing with his father in the exquisite Italian Dolomites, but whose restless quest for self-knowledge through extreme adventures made him the greatest climber of modern times.  This product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply.