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November 4, 2012
Brian Kersey photo

Zac Vawter, fitted with an experimental “bionic” leg, looks out onto the Ledge at the Willis Tower, Thursday, Oct. 25, 2012 in Chicago. Vawter is training for the world’s tallest stair-climbing event where he’ll attempt to climb 103 flights to the top of the Willis Tower using the new prosthesis. Vawter will put his bionic leg to the ultimate test Sunday, Nov. 4, when he attempts to climb 103 flights of stairs to the top of Chicago’s Willis Tower, one of the world’s tallest skyscrapers. If all goes well, he’ll make history with the bionic leg’s public debut.

Brian Kersey photo

Zac Vawter practices walking with an experimental “bionic” leg at the Rehabilitation Institute of Chicago, Thursday, Oct. 25, 2012 in Chicago. Vawter will put his bionic leg to the ultimate test Sunday, Nov. 4, when he attempts to climb 103 flights of stairs to the top of Chicago’s Willis Tower, one of the world’s tallest skyscrapers. If all goes well, he’ll make history with the bionic leg’s public debut.

Brian Kersey photo

Zac Vawter practices walking with an experimental “bionic” leg at the Rehabilitation Institute of Chicago, Thursday, Oct. 25, 2012 in Chicago. Vawter will put his bionic leg to the ultimate test Sunday, Nov. 4, when he attempts to climb 103 flights of stairs to the top of Chicago’s Willis Tower, one of the world’s tallest skyscrapers. If all goes well, he’ll make history with the bionic leg’s public debut.

Brian Kersey photo

Physical therapist assistant Suzanne Finucane, right, helps Zac Vawter as he practices walking with an experimental “bionic” leg at the Rehabilitation Institute of Chicago, Thursday, Oct. 25, 2012 in Chicago. Vawter will put his bionic leg to the ultimate test Sunday, Nov. 4, when he attempts to climb 103 flights of stairs to the top of Chicago’s Willis Tower, one of the world’s tallest skyscrapers. If all goes well, he’ll make history with the bionic leg’s public debut.

Brian Kersey photo

Zac Vawter practices walking with an experimental “bionic” leg at the Rehabilitation Institute of Chicago, Thursday, Oct. 25, 2012 in Chicago. Vawter will put his bionic leg to the ultimate test Sunday, Nov. 4, when he attempts to climb 103 flights of stairs to the top of Chicago’s Willis Tower, one of the world’s tallest skyscrapers. If all goes well, he’ll make history with the bionic leg’s public debut.

Brian Jackson photo

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.”

Brian Jackson photo

Zac Vawter, a 31-year-old amputee, is interviewed after walking up the stairs of the Willis Tower in Chicago, 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.”

Brian Jackson photo

Zac Vawter, a 31—year-old amputee, emerges after walking up the stairs of the Willis Tower in Chicago, 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.”

Brian Jackson photo

Zac Vawter, left, a 31-year-old amputee, walks up the stairs of the Willis Tower in Chicago, 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 when he participated in “SkyRise Chicago.”

Teresa Crawford photo

Zac Vawter, wearing his bionic leg, stands in the center of a group of researchers from the Rehabilitation Institute of Chicago at Willis Tower in Chicago, Sunday, Nov. 4, 2012. Kneeling in front is Levi Hargrove, Director of Neural Engineering for Prosthetics and Orthotics Laboratory at the Rehabilitation Institute of Chicago. Vawter became the first person to stair climb to the 103rd floor of Willis Tower wearing a mind-controlled prosthetic limb Sunday.

Teresa Crawford photo

Zac Vawter arrives on the 103rd floor of Willis Tower, becoming the first person ever to complete the task wearing a mind-controlled prosthetic limb, Sunday, Nov. 4, 2012 in Chicago. Vawter, who lost his right leg in a motorcycle accident, put the smart limb on public display for the first time during an annual stair-climbing charity event called �SkyRise Chicago� hosted by the Rehabilitation Institute of Chicago, where he is receiving treatment.