Man climbs Chicago skyscraper using bionic leg - Article Photos 10/15

Zac Vawter stands on "The Ledge" of the Willis Tower in Chicago after walking up the stairs of the building Sunday, Nov. 4, 2012, to become the first person to climb the 103 floors of one of the world's tallest skyscrapers with a bionic leg. Vawter was wearing a prosthetic leg controlled by his mind while participating in "SkyRise Chicago." (AP Photo/Chicago Sun-Times, Brian Jackson) CHICAGO LOCALS OUT, MAGS OUT