Climbing to the top of a skyscraper is undeniably a challenging endeavor. But for Zac Vawter, it was even more difficult. The 31-year-old amputee made history when he became the first person with a prosthetic leg to climb all 103 flights of stairs at Chicago's Willis Tower, one of the world's tallest skyscrapers. With the help of his mind-controlled bionic leg, Vawter finished the ascent in roughly 45 minutes.
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- 43 TV shows to watch in 2014
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- The U.S. is about to sell weapons to Vietnam. That's bad news for China.
- Did the media get Ferguson wrong?
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- Gamergate might be gaming sexism's Waterloo
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