Senior Master Sgt. Dennis Carr and Tech Sgt. Mark Imbigiotta, 82nd Contracting Squadron, carry the Prisoners of War and Missing in Action flag at Sheppard Air Force Base, Texas, Sept. 18, 2015. A group of Airmen took turns carrying the flag during a 24 hour walk. More than 83,000 Americans from World War I all the way through the Gulf War are still considered missing in action. (U.S. Air Force photo/Senior Airman Kyle Gese)