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LONDON, UNITED KINGDOM - NOVEMBER 01: Queen Elizabeth II (2nd right), Prince Philip, Duke of Edinburgh (left) with Colombia's president Juan Manuel Santos (right) and his wife, Maria Clemencia Rodriguez de Santos (2nd left) look at Colombian items from the Royal collection in the picture Gallery of Buckingham Palace at start of his official state visit to the UK on November 1, 2016 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)

LONDON, UNITED KINGDOM - NOVEMBER 01: Queen Elizabeth II (2nd right), Prince Philip, Duke of Edinburgh (left) with Colombia's president Juan Manuel Santos (right) and his wife, Maria Clemencia Rodriguez de Santos (2nd left) look at Colombian items from the Royal collection in the picture Gallery of Buckingham Palace at start of his official state visit to the UK on November 1, 2016 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)