Servicemembers' messages to their fellows line the walls of the contingency airlift staging facility at Joint Base Balad, Iraq, in this photo taken May 14, 2011. Since the troop surge in 2007, wounded warriors and top military officials have written messages as a way to commemorate their fallen comrades and to thank the Joint Base Balad hospital staff. (U.S. Air Force photo/Staff Sgt. Keyonna Fennell)