LONDON, ENGLAND - JUNE 11: Boats move towards Waterloo Bridge as part of a flotilla of more than 30 boats and vessels that floated down the Thames river in a watery procession from the Palace of Westminster towards the Tower of London before the RAF fly-past after the Trooping the Colour marking the Queen's 90th birthday at The Mall on June 11, 2016 in London, England. The ceremony is Queen Elizabeth II's annual birthday parade and dates back to the time of Charles II in the 17th Century when the Colours of a regiment were used as a rallying point in battle. (Photo by Amy T. Zielinski/Getty Images)
