Maj. George Zaldivar (right) is greeted by Brig. Gen. Michael Miller, the chief of the Medical Service Corps, Office of the Surgeon General, on his way home to the United States from Kandahar Airfield, Afghanistan, in October 2011. Zaldivar suffered a traumatic brain injury when a rocket struck just outside the medical facility in which he worked in Afghanistan. (Courtesy photo/Maj. George Zaldivar)