FRANCE-CANADA-WWI-HISTORY-CENTENARY

Britain's Charles, Prince of Wales (2nd L), Governor General of Canada David Johnston (C), his wife Sharon (2nd R) Britain's Prince William, Duke of Cambridge (2nd L) and Britain's Prince Harry (L) visit the Canadian National Vimy Memorial in Vimy, near Arras, northern France, on April 9, 2017, during a commemoration ceremony to mark the 100th anniversary of the Battle of Vimy Ridge, a World War I battle which was a costly victory for Canada, but one that helped shape the former British colony's national identity. / AFP PHOTO / POOL / Philippe HUGUEN (Photo credit should read PHILIPPE HUGUEN/AFP via Getty Images)