LONDON, ENGLAND - NOVEMBER 02: Colombian President Juan Manuel Santos (R) and Prince Charles, Prince of Wales (C) are shown a collection of natural history books by Professor Kathy Willis, Director of Science, Royal Botanic Gardens, Kew (L) at the Darwin Centre at the Natural History Museum on November 2, 2016 in London, England. The President of the Republic of Colombia Juan Manuel Santos and his wife Maria Clemencia Rodriguez de Santos are paying their first State Visit to the UK as official guests of Queen Elizabeth II. (Photo by Jack Taylor - WPA Pool/Getty Images)
