YPRES, BELGIUM - JULY 31: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge ahead of a ceremony at the Commonwealth War Graves Commisions's Tyne Cot Cemetery on July 31, 2017 in Ypres, Belgium. The commemorations mark the centenary of Passchendaele - The Third Battle of Ypres. (Photo by Darren Staples - Pool /Getty Images)
