Britain's Kate, Duchess of Cambridge, right, and the Duchess of Cornwall ride in a carriage during the Trooping The Colour parade at Buckingham Palace, in London, Saturday, June 11, 2016. Hundreds of soldiers in ceremonial dress have marched in London in the annual Trooping the Color parade to mark the official birthday of Queen Elizabeth II. The Trooping the Color tradition originates from preparations for battle, when flags were carried or "trooped" down the rank for soldiers to see. (AP Photo/Tim Ireland)