The Johns Hopkins Applied Physics Lab created an electronic prosthetic hand and arm that has the same dexterity as a human arm. Electronic prosthetics are the biggest area of growth in this industry. Johns Hopkins Applied Physics Lab hide caption

itoggle caption Johns Hopkins Applied Physics Lab

Soldiers participate in physical therapy while using a prosthetic brace called the Intrepid Dynamic Exoskeletal Orthosis (IDEO), which allows them to use and strengthen severely injured legs. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images