Members of the POW/MIA Vigil Run carry the flag on Joint Base Andrews, Md., Sept. 19, 2013. The flag was to remain constantly in motion during the 24 hour vigil run. National POW/MIA Remembrance Day is observed across the nation on the third Friday of September each year in honor of those who were prisoners of war and those who are still missing in action. (U.S. Air Force photo/Airman 1st Class Nesha Humes)