THIEPVAL, FRANCE - JULY 1: Catherine, Duchess of Cambridge attends a service to mark the 100th anniversary of the beginning of the Battle of the Somme at the Thiepval memorial to the Missing on July 1, 2016 in Thiepval, France. The event is part of the Commemoration of the Centenary of the Battle of the Somme at the Commonwealth War Graves Commission Thiepval Memorial in Thiepval, France, where 70,000 British and Commonwealth soldiers with no known grave are commemorated. (Photo by Chris Radburn - Pool/Getty Images)
