Catherine, Duchess of Cambridge, speaks with French President Francois Hollande (R) on August 4, 2014 in Liege, Belgium, before commemorations marking 100 years since the invasion of Belgium by Germany at the start of World War I. World leaders leaders on Monday commemorated the 100th anniversary of the outbreak of World War I, a small Balkans conflict that went global with the German invasion of neutral Belgium in August 1914.  AFP PHOTO / FRED DUFOUR        (Photo credit should read FRED DUFOUR/AFP/Getty Images)