CHICAGO (October 31, 2012)--Zac Vawter, 31, lost his right leg in a motorcycle accident and now the software engineer is a research subject, helping test a trailblazing prosthetic leg that's controlled by his thoughts.
He will put this bionic leg to the test Sunday 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 and a team of researchers from the Rehabilitation Institute of Chicago will be cheering him on and noting the leg's performance.
Lead researcher Levi Hargrove says the climb will be the bionic leg's first test in the public eye.
"SkyRise Chicago" is a fundraiser for the institute with about 2,700 people climbing the Willis Tower stairs.