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 ...

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 trailblazing ...

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 ...

Climbing up Willis Tower's 103 floors is an impressive feat for anyone. But for Zac Vawter it was an even more impressive feat when he climbed one of the world's tallest towers in a prosthetic leg ...

He’s in shape, so it shouldn’t be a surprise he’s going to attempt to climb the 103 flights of stairs inside Chicago’s Willis Tower this Sunday. “I ran track and cross country in college.” But Zac ...

Chicago’s Willis (formerly “Sears”) Tower is one of the tallest skyscrapers in the world — and yesterday it was scaled by amputee/bionic-badass Zac Vawter. Vawter had assistance, of course, albeit in ...

The Willis Tower climb will be the bionic leg's first test in the public eye, said lead researcher Levi Hargrove of the institute's Center for Bionic Medicine. The climb, called "SkyRise Chicago," is ...