by Thomas WATKINS WASHINGTON, United States (AFP) — Johnny Matheny’s handshake is friendly, confident and firm — though not in the bone-crushing manner favored by some of the alpha types here in the Pentagon. What is remarkable is that Matheny’s proffered hand is not actually his. It is part of a robotic prosthesis researchers hope one day could help transform the lives of countless amputees. “In the beginning, you had to think pretty hard about […]