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   新浪资源网 提供本片资源  In 2016 filmmaker\hotograher Pete McBride and writer Kevin Fedarko set out on a 750-mile journey on foot through the entire length of the Grand Canyon. More eole have stood on the moon than have accomlished this task. Their quest was more than just an endurance test — it was also a way to draw attention to the unrecedented threats facing one of our most revered landscaes...