Pope Francis (R) poses with US President Donald Trump (C), US First Lady Melania Trump and the daughter of US President Donald Trump Ivanka Trump (L) at the end of a private audience at the Vatican on May 24, 2017. US President Donald Trump met Pope Francis at the Vatican today in a keenly-anticipated first face-to-face encounter between two world leaders who have clashed repeatedly on several issues. / AFP PHOTO / POOL / Evan Vucci        (Photo credit should read EVAN VUCCI/AFP/Getty Images)