Camilla Duchess of Cornwall and Catherine Duchess of Cambridge arrive at Horseguards Parade for the...
Camilla Duchess of Cornwall (L) and Catherine Duchess of Cambridge arrive at Horseguards Parade for the annual Trooping the Colour ceremony in central London, Britain June 11, 2016. Trooping the Colour is a ceremony to honour Queen Elizabeth's official birthday. The Queen celebrates her 90th birthday this year. REUTERS/Dylan Martinez