US national security advisor John Bolton attending the French - USA Commemoration marking the 75th anniversary of the Allied landings on D-Day at the Normandy American Cemetery and Memorial in Colleville-sur-Mer, France, 06 June 2019. World leaders are attending memorial events in Normandy, France to mark the 75th anniversary of the D-Day landings, which marked the beginning of the end of World War II in Europe. Ian Langsdon/Pool via REUTERS - RC1673906310