By Associated Press Comments Zoom Zac Vawter, a 31-year-old amputee, emerges at the top of Willis Tower in Chicago on Sunday. The high-tech leg heÂ's wearing bends and moves using signals from VawterÂ's brain. (Brian Jackson Chicago Sun-Times) Chicago â€" A 31-year-old amputee has made history, becoming the first person to climb 103 floors of one of the world's tallest skyscrapers with a bionic leg. Zac Vawter was wearing a prosthetic leg controlled by his mind Sunday when he participated in "SkyRise Chicago." The charity event raises funds for the Rehabilitation Institute of Chicago. The event marked the bionic leg's first test in the public eye. As Vawter thought about climbing stairs, the...
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