FILE - In this Thursday, March 27, 2014 file photo, U.S. President Barack Obama, left, reacts as he meets with Pope Francis, center, during their exchange of gifts at the Vatican. Obama called himself a "great admirer" of Pope Francis as he sat down at the Vatican Thursday with the pontiff he considers a kindred spirit on issues of economic inequality. In September 2015, the pope's introduction to the U.S. will begin in Washington, where he will address a joint meeting of Congress, followed by an address to the U.N. General Assembly in New York, and outdoor Mass at the World Meeting of Families in Philadelphia. At right is Msgr. Mark Miles, who was the English translator for the Pontiff. (AP Photo/Pablo Martinez Monsivais)