A collegiate athlete , Steve Vawter had his right leg amputated after a motorcycle accident . He has been fitted with a prosthetic that ascertains his intentions and then moves . Vawter climbs up Chicago 's Sears Tower in 2 minutes , 45 seconds . ` ` It was a good goal for the team to shoot for , and we hit it , '' he says .
A collegiate runner , Zac Vawter had his right leg amputated after a motorcycle accident . He has been equipped with a prosthetic that ascertains his intentions and then moves . Vawter climbs up Chicago 's Willis Tower in 53 minutes , 9 seconds . `` It was a good goal for the team to shoot for , and we hit it , '' he says .