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Zac Vawter will use 'bionic leg' controlled by his thoughts to climb Chicago ...
Herald Sun
Zac Vawter, who lost his leg in a motorcycle accident, looks down from the Ledge at the Willis Tower in Chicago. He'll put his 'bionic leg' to the test in s charity climb up 103 flights to the top of the skyscraper. Source: AP. ZAC Vawter is helping to test a ...
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