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World War One: Young royals attend St Symphorien ceremony

4 August 2014 Last updated at 21:03 BST

The Duke and Duchess of Cambridge have arrived at St Symphorien Military Cemetery, near Mons in Belgium, for a ceremony to mark 100 years since Britain joined World War One.

National leaders, military chiefs, and the families of the fallen are reflecting on the lives of those who died in the war.