(L-R) Britain's Queen Elizabeth II, Colombia's President Juan Manuel Santos, Britain's Prince Philip, Duke of Edinburgh and first lady Maria Clemencia de Santos stand during the ceremonial welcome at Horse Guards Parade in central London, on November 1, 2016. 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 / STEFAN WERMUTH (Photo credit should read STEFAN WERMUTH/AFP/Getty Images)
