Tagged with retroreflective markers that infrared cameras detect to record position and analyze gait and balance, a war-wounded amputee research subject takes part in a new collaborative study involving Mayo Clinic, University of Illinois at Chicago and U.S. Navy researchers. It is based at state-of-the-art facilities of the Naval Medical Center San Diego (NMCSD). The research goal is to improve training methods for rehabilitating amputee-wounded warriors using advanced technology and novel techniques.