Britain's Prince Charles, left, Prince William, centre, and Princess Anne, right, ride their horses as they escort Queen Elizabeth II, to attend the Trooping the Colour parade, in central London, Saturday, June 14, 2014. Queen Elizabeth II is celebrating her birthday with traditional pomp and circumstance. More than 1,000 soldiers, horses and musicians are taking part in the parade known as "Trooping the Colour," an annual ceremony.(AP Photo/Lefteris Pitarakis)