U.S. Air Force Master Sgt. Amanda Wood, 718th Intel Squadron Alpha flight chief, leads the pack during the POW/MIA 24 Hour Run/Walk Vigil at Langley Air Force Base, Va., Sept. 15, 2011. Approximately 350 runners and walkers volunteered to keep the POW/MIA flag continuously moving for 24 hours. (U.S. Air Force photo by Airman 1st Class Teresa Cleveland/Released)