Britain's Prince Charles, Prince of Wales shares a joke with with Colombian President Juan Manuel Santos (R) as they tour the Darwin Centre at the Natural History Museum on November 2, 2016 in London. 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 Britain's Queen Elizabeth II. / AFP / POOL / Jack Taylor (Photo credit should read JACK TAYLOR/AFP/Getty Images)
