LONDON, ENGLAND - AUGUST 05:  (L-R) Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit The Tower Of London's Ceramic Poppy installation 'Blood Swept Lands and Seas of Red' by artist Paul Cummins, commemortating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England.  (Photo by Samir Hussein/WireImage)