(Left photo) Ryan Blanck, a prosthetist at the Center for the Intrepid, in San Antonio, shows how the energy-storing Intrepid Dynamic Exoskeletal Orthosis, or IDEO, works. He invented it in 2009. (Right photo) Spc. Michael Krapels works on his side-to-side running drills using the IDEO. The design of the IDEO allows for side-to-side movement due to the struts that connect the top and bottom pieces together.