Fred Downs, Jr., a Vietnam veteran and former executive with the Department of Veterans Affairs, stands next to a temporary exhibit featuring a technologically-innovative prosthetic arm, known as the "LUKE" Arm, developed by DEKA Research & Development Corp. and provided to NMHM by DARPA in 2015. Downs participated in Brain Awareness Week at the National Museum of Health and Medicine, Silver Spring, Md. on Monday, March 13, 2017. (National Museum of Health and Medicine

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Keywords: air, america, archive, armed, army, defence, force, forces, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa