CHICAGO (AP) — A 31-year-old amputee has made history, becoming the first person to climb 103 floors of one of the world's tallest skyscrapers with a bionic leg. Zac Vawter was wearing a prosthetic ...

(AP) Zac Vawter considers himself a test pilot. After losing his right leg in a motorcycle accident, the 31-year-old software engineer signed up to become a research subject, helping to test a ...

CHICAGO (AP) – The metal on Zac Vawter’s bionic leg gleamed as he climbed the 103 floors of Chicago’s iconic Willis Tower, becoming the first person ever to complete the task wearing a mind-controlled ...

CHICAGO (AP) — Zac Vawter considers himself a test pilot. After losing his right leg in a motorcycle accident, the 31-year-old software engineer signed up to become a research subject, helping to test ...