LONDON, ENGLAND - MARCH 09: Guests including Boris Johnson, Prince Harry, Jeremy Corbyn, Princess Anne, the Princess Royal, Camilla, duchess of Cornwall, Prince Charles, Prince of Wales, Queen Elizabeth II, Prince Phillip, Duke of Edinburgh, Teresa May and Michael Fallon attend the dedication service of The Iraq and Afghanistan memorial at Horse Guards Parade on March 9, 2017 in London, England.  (Photo by Stuart C. Wilson/Getty Images)