Bionic leg uses mind control

An American amputee has climbed 103 storeys of a skyscraper using a “bionic” mind-controlled false leg.

Zac Vawter, who lost his right leg in a motorcycle accident, scaled around 2,100 steps to the top of Chicago’s Willis Tower.

“Everything went great,” said. “The prosthetic leg did its part, and I did my part.”