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Zac Vawter Climbs Willis Tower With Bionic Leg

He climbed 103 floors of Willis Tower with a mind-controlled prosthetic leg.

Zac Vawter Climbs Chicago's Willis Tower With Bionic Leg

Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter Climbs Willis Tower
Zac Vawter practices walking with an experimental "bionic" leg at the Rehabilitation Institute of Chicago, Oct. 25, 2012 in Chicago. (Brian Kersey/AP Photo)
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