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VIMY, FRANCE - APRIL 09: (L-R) Sophie Trudeau; her son Xavier James Trudeau; Canadian Prime Minister Justin Trudeau; French President Francois Hollande; Governor General of Canada David Johnston; Prince Charles, Prince of Wales; Sharon Johnston; Prince William, Duke of Cambridge and Prince Harry pose for a group photograph as they arrive at the Canadian National Vimy Memorial on April 9, 2017 in Vimy, France. The Prince of Wales, The Duke of Cambridge and Prince Harry along with Canadian Prime Minister Justin Trudeau and French President Francois Hollande attend the centenary commemorative service at the Canadian National Vimy Memorial. The Battle Of Vimy Ridge was fought during WW1 as part of the initial phase of the Battle of Arras. Although British-led it was mostly fought by the Canadian Corps. (Photo by Jack Taylor - Pool/Getty Images)

VIMY, FRANCE - APRIL 09: (L-R) Sophie Trudeau; her son Xavier James Trudeau; Canadian Prime Minister Justin Trudeau; French President Francois Hollande; Governor General of Canada David Johnston; Prince Charles, Prince of Wales; Sharon Johnston; Prince William, Duke of Cambridge and Prince Harry pose for a group photograph as they arrive at the Canadian National Vimy Memorial on April 9, 2017 in Vimy, France. The Prince of Wales, The Duke of Cambridge and Prince Harry along with Canadian Prime Minister Justin Trudeau and French President Francois Hollande attend the centenary commemorative service at the Canadian National Vimy Memorial. The Battle Of Vimy Ridge was fought during WW1 as part of the initial phase of the Battle of Arras. Although British-led it was mostly fought by the Canadian Corps. (Photo by Jack Taylor - Pool/Getty Images)