NEW YORK, NY - JANUARY 29:  U.S. Military veteran and amputee Lloyd Epps walks after doctors serviced his prosthetic leg at the Veterans Administration (VA), hospital on January 29, 2014 in Manhattan, New York City. Epps, who lost his leg to an infection in 2010, wears a hightech custom prosthetic from the VA which powers his gait forward.  (Photo by John Moore/Getty Images)