Canada's Prime Minister Stephen Harper, accompanied by his wife Laureen (R), Britain's Prince Charles (2nd L) and Britain's Camilla, Duchess of Cornwall, sings the national anthem during a Canadian-French ceremony at the Juno Beach Centre in Courseulles sur Mer, France June 6, 2014. World leaders and veterans gathered by the beaches of Normandy on Friday to mark the 70th anniversary of World War Two's D-Day landings. REUTERS/Chris Helgren (FRANCE - Tags: ANNIVERSARY POLITICS CONFLICT MILITARY ROYALS)