U.S. Air Force Gen Tod D. Wolters, U.S. Air Forces in Europe - Air Forces Africa commander, delivers a speech at a Memorial Day ceremony at the Lafayette Escadrille Memorial, in Marnes-la-Coquette, France, May 28, 2017. This Memorial Day is especially signifcant because 2017 marks the centennial of United States’ entry into the First World War. (U.S. Air Force photo by Capt. Ben Sowers/Released)