LONDON, UNITED KINGDOM - AUGUST 05:  Catherine, The Duchess of Cambridge adds a ceramic poppy watched by Prince William, Duke of Cambridge as she visits The Tower of London's 'Blood Swept Lands and Seas of Red' ceramic poppy installation by artist Paul Cummins, commemorating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England.  (Photo by John Stillwell/WPA Pool/Getty Images)