Move over, Steve Austin, there's another bionic man in town.
Zac Vawter will attempt to use the power of his mind to enable him to climb to the top of Willis Tower in Chicago on Sunday.
Vawter, from Yelm, Wash., lost his right leg in a motorcycle accident and has been testing a groundbreaking bionic leg since 2009. It works by responding to electrical impulses from muscles in his hamstring. By simply thinking what action he wants his leg to take, motors, belts and chains in his prosthetic leg are designed to synchronize the movements of his ankle and knee.
He hopes to climb the 103 flights of stairs in about one hour.
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