LONDON, ENGLAND - MARCH 13: (L-R) Prince Harry, Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Prince Philip, Duke of Edinburgh and Queen Elizabeth II attend a Service of Commemoration for troops who were stationed in Afghanistan at St Paul's Cathedral on March 13, 2015 in London, England. (Photo by John Stillwell - WPA Pool / Getty Images)
