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clip cnn10 2017-11-20 blind-rock-climber 截取视频.mp4 AZUZ: Kayaking the Colorado River Rapids, summiting Mt. Everest, mountain biking Colorado`s 100-mile Leadville Trail, skydiving 1_____. Adventurers take on these challenges all the time. One thing that makes an American named Erik Weihenmayer 2____ ____ is that he`s done them all and without the sense of sight. He explains how he faces those challenges in today`s "Great Big Story".