Catherine (R), Duchess of Cambridge, smiles to a young girl during a reception at Mons' city hall, ahead of a ceremony in Saint-Symphorien cemetery, as part of the 100th anniversary of the outbreak of World War I, on August 4, 2014. Prince William, his wife, brother Prince Harry and British Prime Minister David Cameron lead the tributes in Mons where the first British soldier died. World leaders on August 4 commemorated the 100th anniversary of the outbreak of World War I by warning of lessons to be learned in the face of today's many crises, including Ukraine. AFP PHOTO / BELGA / VIRGINIE LEFOUR ***BELGIUM OUT*** (Photo credit should read VIRGINIE LEFOUR/AFP/Getty Images)
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