Willis Tower

Amputee Uses Thought-Controlled Bionic Leg to Climb Chicago’s Willis Tower

Amputee Uses Thought-Controlled Bionic Leg to Climb Chicago’s Willis Tower

Climbing 103 flights of stairs without collapse is a noteworthy achievement for any human being, but when said human only has one leg, it's nothing short of miraculous. Thirty-one year-old Zac Vawter lost

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