The King's Troop Royal Horse Artillery practise their maneuvers on the Mall leg of the route during the rehearsal of the State Opening of Parliament...
{"Image ImageDescription": "LONDON, ENGLAND - MAY 22:  The King's Troop Royal Horse Artillery practise their maneuvers on the Mall leg of the route during the rehearsal of the State Opening of Parliament on May 22, 2015 in London, England. Rehearsals get on the way for the forthcoming State Opening of Parliament which marks the formal start of the parliamentary year and the Queen's Speech sets out the government's agenda for the coming session.  (Photo by Joseph Okpako/Getty Images)", "Image Copyright": "2015 Getty Images"}