U.S. Air Force 20th Fighter Wing F-16CM Fighting Falcon pilots fly over a ceremony honoring late Col. Charles C. Heckel, a World War II prisoner of war, at Shaw Air Force Base, S.C., Jan. 19, 2018. The pilots navigated in a missing man formation as an aerial salute to Heckel’s time as a prisoner of war in Germany from October 1944 to April 1945. (U.S. Air Force photo by Airman 1st Class Kathryn R.C. Reaves)