Members of the King's Troop Royal Horse Artillery take part in a 41 Gun Royal Salute to mark the 91st birthday of Britain's Queen Elizabeth II in Hyde Park, central London on April 21, 2017. /
{"Image ImageDescription": "Members of the King's Troop Royal Horse Artillery take part in a 41 Gun Royal Salute to mark the 91st birthday of Britain's Queen Elizabeth II  in Hyde Park, central London on April 21, 2017. / AFP PHOTO / BEN STANSALL        (Photo credit should read BEN STANSALL/AFP via Getty Images)"}