Zac Vawter lost his lower leg in a motorcycle accident four years ago, and after years in a regular prosthetic leg, he's testing the first one controlled by brainwaves. The Army-funded research could ... more 
Zac Vawter lost his lower leg in a motorcycle accident four years ago, and after years in a regular prosthetic leg, he's testing the first one controlled by brainwaves. The Army-funded research could improve the lives of the more than 1,200 soldiers and approximately one million Americans who have lower leg amputations. Dr. Jon LaPook reports. less 
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Thu, Sep 26, 2013 12:32 PM EDT