Britain's Queen Elizabeth II (2R), Colombia's President Juan Manuel Santos (R), Britain's Prince Philip, Duke of Edinburgh (L) and Colombia's First Lady Maria Clemencia Rodriguez (2L) look at Colombian items from the Royal Collection in the Picture Gallery of Buckingham Palace in central London on November 1, 2016 on the first day of the Colombian state visit to the UK. Colombian President Juan Manuel Santos, who won this year's Nobel Peace Prize for his efforts to implement a peace deal with FARC rebels, begins a state visit to Britain that includes a trip to once conflict-ridden Northern Ireland. / AFP / POOL / John Stillwell (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
