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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 looks out onto the Ledge at the Willis Tower, Oct. 25, 2012 in Chicago. (Brian Kersey/AP Photo)
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