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George Tyssen Butler (12 October 1943 – 21 October 2021) was a British filmmaker and photographer, and a pioneer of the theatrical documentary. Some of his most popular films include Pumping Iron (1977), which introduced a wider audience to Arnold Schwarzenegger, The Endurance films, retelling Sir Ernest Shackleton's saga of Antarctic survival, and Going Upriver: The Long War of John Kerry (2004), about his friend John Kerry's leadership in the peace movement. Wikipedia