This article profiles John Kuniholm, a 34-year-old PhD candidate in biomedical engineering at Duke University and has master's degrees in mechanical engineering and industrial design from North Carolina State University. He has worked in the research and development of tools for robotic cardiac surgery for Cardiovations, a Johnson & Johnson company. A graduate of The North Carolina School of Science of Mathematics and Dartmouth College, he is an officer in the Marine Corps Reserve and has served with distinction for nine years. Kuniholm was sent to Iraq in 2004. On New Year's Day 2005, Iraqi insurgents ambushed his patrol car near the Euphrates River. They remotely detonated a device packed with shrapnel and explosives, and then started firing their weapons as the platoon took cover and returned fire. He was wounded in the initial explosion, and his right arm was later amputated below the elbow. As part of his healing process, today, he has been fitted with three prostheses. His experiences with prosthetics and his background in biomedical engineering have motivated him to become knowledgeable about the trials amputees are forced to reckon with. To people who know him, Kuniholm is an ordinary man who has done extraordinary things since returning home from the Iraq war in 2005.