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ALBERT, FRANCE - JULY 01: Catherine, Duchess of Cambridge and Prince Harry attend The Commemoration of the Centenary of The Battle of the Somme at The Commonwealth War Graves Commision Thiepval Memorial on July 01, 2016 in Albert, France. (Photo by UK Press Pool/UK Press via Getty Images)

ALBERT, FRANCE - JULY 01:  Catherine, Duchess of Cambridge and Prince Harry attend The Commemoration of the Centenary of The Battle of the Somme at The Commonwealth War Graves Commision Thiepval Memorial on July 01, 2016 in Albert, France.  (Photo by UK Press Pool/UK Press via Getty Images)