Children watch French military units march on the street during a Bastille Day ceremony in Metz, France, July 13, 2018. The U.S. Air Force 52nd Fighter Wing base Honor Guard marched with French military members at the ceremony to honor the heroism, selfless service and sacrifice of Americans who came to Europe to fight for peace and liberty during World War I. (U.S. Air Force photo by Senior Airman Preston Cherry)