(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 ...
(AP) 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 limb ...
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