U.S. President Donald Trump attends a ceremony to mark the 75th anniversary of the D-Day landing at the Normandy American Cemetery and Memorial in Colleville-sur-Mer, Normandy, France, June 6, 2019. A commemoration was held on Thursday in Normandy, north France, to mark the 75th anniversary of the D-Day landings against Nazi forces in World War II. (Xinhua/Mao When)

French President Emmanuel Macron (R) and his wife Brigitte Macron attend a ceremony to mark the 75th anniversary of the D-Day landing at the Normandy American Cemetery and Memorial in Colleville-sur-Mer, Normandy, France, June 6, 2019. A commemoration was held on Thursday in Normandy, north France, to mark the 75th anniversary of the D-Day landings against Nazi forces in World War II. (Xinhua/Mao When)

President Emmanuel Macron (L) and U.S. President Donald Trump (R) attend a ceremony to mark the 75th anniversary of the D-Day landings at the Normandy American Cemetery and Memorial in Colleville-sur-Mer, Normandy, France, June 6, 2019. A commemoration was held on Thursday in Normandy, north France, to mark the 75th anniversary of the D-Day landings against Nazi forces in World War II. (Xinhua/Mao When)