Perspective: Wounded drive innovation in prosthetics

Using his muscular arms and steely determination, he steadied himself on the parallel bars as he walked gingerly along the mat at Naval Medical Center San Diego. "If I stand straight, this leg is good," said Strong, nodding to his left, "but the other leg buckles."

Peter Harsch, the center's newly hired prosthetist, listened and made adjustments.

"Prosthetics are like a car," Harsch said. "If a car's tires aren't aligned, the car won't drive right."

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