Airmen run through Heritage Park during the POW/MIA 24-hour Run/Walk Vigil at Langley Air Force Base, Va., Sept. 16, 2011. Approximately 350 runners and walkers participated in the two-day event honoring National POW/MIA Recognition Day, observed on the third Friday in Sept. (U.S. Air Force photo by Airman 1st Class Kayla Newman/Released)