U.S. Air Force Lt. Col. Dennis Phillips, 31st Civil Engineer Squadron commander, leads a formation of Airmen during the Prisoner of War/Missing in Action Remembrance Week retreat ceremony Sept. 17, 2015, at Aviano Air Base, Italy. According to the Defense POW/MIA Accounting Agency, there are still 83,114 service members, since World War II, who are unaccounted for. (U.S. Air Force photo by Senior Airman Areca T. Bell/Released)