This movie offers so many potential avenues from which I could approach it that I’m finding it almost as overwhelming as climbing the north face of the Eiger while an unknown assassin tries to kill me because he knows I’m trying to kill him. There’s the career of geologist-filmmaker Arnold Fanck, whose fascination with mountains and mountaineering resulting in a series of films possessed of breathtaking beauty and power. There’s the subject of mountaineering itself, and of the depiction of mountain climbing in film. There’s the subject of silent film, and more specifically, silent spectacle and action films, which were far more lavish and epic in scope than most people ever imagine. And perhaps the 900 pound gorilla in the room is the bizarre and difficult career of German actress turned Nazi propagandist and, until her death in 2003 at the age of 101, the world’s oldest living certified scuba diver, Leni Riefenstahl. Hers is a story of incredible talent, revolutionary film technique, terrifying loyalty to Adolf Hitler, arrest by a naval intelligence officer working with a John Ford film crew, war crimes, and after the dust settled, a career as an underwater nature photographer.