CHICAGO 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 ...

Despite losing most of his right leg in a motorcycle accident, Zac Vawter (31) intends to climb all 103 flights of stairs at Chicago's Willis Tower this Sunday. He's been helping researchers at the ...

Zac Vawter, a 31-year-old who lost his right leg in a motorcycle accident, became the first person to scale the 103-story Willis Tower in Chicago with a mind-controlled robotic leg. The artificial leg ...

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 ...

A Washington man will be trailblazing a path to the top on Sunday. Thirty-one-year-old software engineer Zac Vawter is attempting to climb 103 flights of stairs to the top of Chicago's Willis Tower, ...

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

There's a lot of grim news out there today, so here's a bit of the feel-good variety from the weekend: Zac Vawter, 31, climbed 103 floors of Chicago's Willis Tower using a prosthetic leg that he ...

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 ...