U.S. Air Force Master Sgt Justin Harrison, 633rd Medical Squadron outpatient physical therapy non-commissioned officer in charge, walks with the prisoner of war/missing in action flag during the 2013 POW/MIA walk at Langley Air Force Base, Va., Sept. 19, 2013. The walk was a part of a 24-hour event honoring the nation’s POW/MIA Service members. (U.S. Air Force photo by Airman 1st Class Victoria H. Taylor/Released)