Airmen render salutes as the U.S. flag is raised to full staff then lowered during the POW/MIA retreat ceremony in front of the 28th Bomb Wing Headquarters building at Ellsworth Air Force Base, S.D., Sept. 20, 2013. The ceremony honored servicemembers listed as missing in action or served as a prisoner of war – recognizing the sacrifices they’ve made for their country. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)