Soldiers from The King's Troop Royal Horse Artillery mark the eighty ninth birthday of Britain's Queen Elizabeth with a forty one round Royal Salute in Hyde Park, London, April 21, 2015 REUTERS/Cathal... more 
Soldiers from The King's Troop Royal Horse Artillery mark the eighty ninth birthday of Britain's Queen Elizabeth with a forty one round Royal Salute in Hyde Park, London, April 21, 2015 REUTERS/Cathal McNaughton less 
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Reuters | Photo By CATHAL MCNAUGHTON / REUTERS
Tue, Apr 21, 2015 8:06 AM EDT