U.S. Marine Corps Sgt. Matthew Troyer, Basic Still Photography instructor at the Defense Information School, explains the history of the Hall of Heroes during a memorial service and induction ceremony at DINFOS on Fort George G. Meade, Md., July 27, 2015. The ceremony was in honor of U.S. Marine Corps Cpl. Sara A. Medina and Lance Cpl. Jacob A. Hug, combat photographers who were killed during earthquake relief operations in Nepal, May 12, 2015. (DoD photo by Shane Keller/Released)