Today in Pictures: April 19, 2012 Captain Owen Beynon Brown from the King's Troop Royal Horse Artillery holds his dog Lord Percy, a resident at the barracks up for Tango his horse to greet, at Wellington Barracks in London, April 19, 2012. The King's Troop are preparing for an inspection in Hyde Park, in preparation for 2012 ceremonial roles in the Queen's Diamond Jubilee, Trooping the Colour and London 2012 Olympics. Kirsty Wigglesworth/AP Photo