U.S. Air Force Airman 1st Class Mark Underhill, 633 Medical Operations Squadron pediatric medical technician, carries the POW/MIA flag into the 2014 POW/MIA Ceremony at Langley Air Force Base, Va., Sept. 17, 2014. Underhill said he wanted to honor his step grandfather, U.S. Army Sgt. Charles Layton, who was held captive for 17 weeks during the Korean War. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)