U.S. Army Spc. Marcos Fernandes, an infantryman with Bravo Company, 3rd Battalion, 15th Infantry Regiment, 4th Infantry Brigade Combat Team, 3rd Infantry Division, talks with the surgeons general of the Army, Navy, Air Force and United Kingdom, and their entourage, at Craig Joint Theater Hospital’s concussion care center during their visit to Bagram Airfield in Parwan province, Afghanistan, April 17, 2013. Fernandes was being treated for a concussion after a round ricocheted off his helmet during a firefight. The center provides a place for service members to recover after sustaining concussions before they return to the field. The surgeons general of the Army, Navy, Air Force and the United Kingdom got a overview of Bagram Air Field's medical capabilities during a tour of the base. (U.S. Army National Guard photo by Spc. Mark VanGerpen/Released)