Ron Cianci, an inmate at the Curran-Fromhold Correction Facility, is blessed by Pope Francis on Sept. 27, 2015, in Philadelphia. (Todd Heisler, AFP/Getty Images)
Photo gallery: Pope Francis visits the U.S. and Cuba.
Pope Francis acknowledges the chair made for him by inmates at Curran-Fromhold Correctional Facility on Sept. 27, 2015, in Philadelphia. (Tony Gentile, AFP/Getty Images)
Pope Francis addresses inmates at the Curran-Fromhold Correctional Facility on Sept. 27, 2015, in Philadelphia. (Todd Heisler, AFP/Getty Images)
Attendees wave to TV cameras as they wait for the beginning of the mass for the conclusion of the World Meeting of Families on Benjamin Franklin Parkway, Sunday, Sept. 27, 2015 in Philadelphia. (Alex Wong / AP)
Stacey Escalante, of Dallas, Texas, plays with a Papal Visit wrist band as she waits at the barricades for Pope Francis to celebrate Mass, Sunday, Sept. 27, 2015, in Philadelphia. (John Minchillo / AP)
People gathered on the Benjamin Franklin Parkway chant and hold up signs to protest a tent that was erected, blocking their view of Pope Francis before his Mass, Sunday, Sept. 27, 2015, in Philadelphia. (Matt Rourke / AP)
Pope Francis greets inmates during his visit to Curran Fromhold Correctional Facility in Philadelphia, Sunday, Sept. 27, 2015. (David Maialetti / AP)
Members of the St. Anthony of Padua Church in Camden, N.J., walk over the Benjamin Franklin Bridge ahead of a Sunday Mass to be ce;ebrated by Pope Francis, Sunday, Sept. 27, 2015, in Philadelphia. (Julio Cortez / AP)
Sister Beatrice, center, of The Sisters of Life, of New York City, smiles as she holds her ticket by a checkpoint as they arrive for a Mass to be celebrated by Pope Francis, Sunday, Sept. 27, 2015, in Philadelphia. (John Minchillo / AP)
Seven-year-old Leyla Drees of Stewartville, Minn., clings to her Pope Francis doll while watching the pope’s speech on immigration on a giant monitor at JFK Plaza in Philadelphia on Saturday, Sept. 26, 2015. (Christopher Dolan / AP)
Pope Francis touches a woman in a wheelchair after he addressed a gathering in Saint Martin’s Chapel at St. Charles Borromeo Seminary Sunday, Sept. 27, 2015, in Wynnewood, Pa. (Mel Evans / AP)
Faithful pray as they wait at the Benjamin Franklin Parkway for Pope Francis to lead an open-air mass in Philadelphia, Pennsylvania, on Sept. 27, 2015. (Jewel Samad, AFP/Getty Images)
Pope Francis waves to the crowd during a parade Saturday, Sept. 26, 2015, in Philadelphia. (Matt Rourke / AP)
Pope Francis listens to Andrea Bocelli, left, during the Festival of Families in Philadelphia on Sept. 26, 2015. (Eric Thayer / AP)
Pope Francis embraces a young man in a wheelchair during the World Meeting of Families in the Benjamin Franklin Parkway Saturday, Sept. 26, 2015, in Philadelphia. (Alessandra Tarantino / AP)
Pope Francis speaks at Independence Hall in Philadelphia on Sept. 26, 2015. (Vincenzo Pinto, AFP/Getty Images)
Nuns watch as Pope Francis celebrates Mass at the Cathedral Basilica of Saints Peter and Paul Sept. 26, 2015, in Philadelphia. (Tony Gentile / AP)
Pope Francis addresses parishioners during mass at the Cathedral Basilica of Saints Peter and Paul in Philadelphia on Sept. 26, 2015. (CJ Gunther / EPA)
A woman cries as Pope Francis blesses her disabled son upon arrival in Philadelphia on Sept. 26, 2015, on the final leg of his six-day visit to the U.S. (Nicholas Kamm / AFP/Getty Images)
Pope Francis arrives in Philadelphia on Sept. 26, 2015 on the final leg of his six-day visit to the United States (Nicholas Kamm / AFP/Getty Images)
A woman holds a doll of Pope Francis while people attend the departure of the Pope from John F. Kennedy International Airport in New York Sept. 26, 2015. (AFP/Getty Images)
Pope Francis pays tribute to all those who died at the service of the U.N. around the world Sept. 25, 2015, at United Nations headquarters. At left is Secretary-General of the United Nations Ban Ki-moon. (Tony Gentile / AP)
Bellatrix, right, has her costume adjusted by owner Ashley Spann while posing for photos for pedestrians with Addie, left, and owner Emily Mariani, right, outside the Pennsylvania Convention Center, host of the World Meeting of Families conference Sept. 25, 2015, in Philadelphia. (David Goldman / AP)
Pope Francis places a white rose at the south pool of the 9/11 Memorial in downtown Manhattan on Sept. 25, 2015, in New York. (John Minchillo / AP)
Pope Francis addresses the 70th session of the United Nations General Assembly on Sept. 25, 2015. (Seth Wenig / AP)
Pope Francis speaks during the 70th session of the United Nations General Assembly on Sept. 25, 2015. (Vincenzo Pinto / AFP/Getty Images)
Pope Francis arrives at the United Nations in New York on Sept. 25, 2015. (Tony Gentile / EPA)
Pope Francis waves as he approaches St. Patrick’s Cathedral to lead evening prayers in New York on Sept. 24, 2015. (Jewel Samad / AFP/Getty Images)
The Vatican flag flies outside the United Nations headquarters on Sept. 25, 2015 in New York City. (Carl Court / Getty Images)
Pope Francis, accompanied by Vice President Joe Biden, waves to the crowd outside the Capitol Building after addressing Congress in Washington, on Sept. 24, 2015. (AFP/Getty Images)
Pope Francis addresses a joint meeting of Congress in the House Chamber of the U.S. Capitol on Sept. 24, 2015. (Mark Wilson / Getty Images)
Pope Francis addresses a joint meeting of Congress on Sept. 24, 2014 in Washington. (Jim Watson / AFP/Getty Images)
People watch Pope Francis address a joint meeting of Congress in front of the U.S. Capitol in Washington. (Nicholas Kamm / AFP/Getty Images)
Pope Francis is applauded as he arrives on Capitol Hill on Sept. 24, 2015, to address a joint meeting of Congress, making history as the first pontiff to do so. (Carolyn Kaster / AP)
Pope Francis walks to his Fiat 500L to depart the Apostolic Nunciature, the Vatican’s diplomatic mission in the heart of Washington, en route to the Capitol to address a joint meeting of Congress on Sept. 24, 2015. (Cliff Owen / AP)
Cartrice Haynesworth, center, has a selfie taken with Pope Francis as he walks through the crowd during a visit to Catholic Charities of the Archdiocese of Washington, on Sept. 24, 2015. (David Goldman / AP)
People wait for Pope Francis to appear from the Speaker’s Balcony on Capitol Hill in Washington on Sept. 24, 2015. (Susan Walsh / AP)
Pope Francis speaks to U.S. bishops during a midday prayer service at St. Matthew’s Cathedral in Washington on Sept. 23, 2015. (Mark Wilson / EPA)
Cardinal Donald Wuerl, archbishop of Washington, right, translates for Pope Francis as the pontiff laments that he won’t have time to greet everyone after a midday prayer with U.S. bishops on Sept. 23, 2015, at St. Matthew’s Cathedral in Washington. (Susan Walsh / AP)
Michelle Obama, Pope Francis and President Barack Obama wave to the crowd on the South Lawn from the Truman Balcony of the White House on Sept. 23, 2015. (Andrew Harnik / AP)
People cheer before a parade for Pope Francis on Sept. 23, 2015, in Washington. (Alex Brndon, AFP/Getty Images)
Pope Francis greets well-wishers outside the Apostolic Nunciature to the United States in Washington on Sept. 23, 2015. (Molly Riley, AFP/Getty Images)
President Barack Obama welcomes Pope Francis to the White House on Sept. 23, 2015. (Vincenzo Pinto / AFP-Getty Images)
President Barack Obama stands alongside Pope Francis during an arrival ceremony on the South Lawn of the White House on Sept. 23, 2015. (Mandel Ngan, AFP/Getty Images)
Pope Francis and President Barack Obama walk outside the White House on their way to an Oval Office meeting on Sept. 23, 2015. (Mandel Ngan, AFP/Getty Images)
Pope Francis attends an arrival ceremony with President Barack Obama on the South Lawn of the White House on Sept. 23, 2015. (Michael Reynolds / EPA)
President Barack Obama welcomes Pope Francis to the White House on Sept. 23, 2015. (Vincenzo Pinto / AFP-Getty Images)
Pope Francis gets a kiss outside the Apostolic Nunciature to the United States in Washington on Sept. 23, 2015. (Molly Riley / AFP-Getty Images)
People listen as Pope Francis speaks during an arrival ceromony at the White House on Sept. 23, 2015. (Vincenzo Pinto / AFP-Getty Images)
President Barack Obama and Pope Francis review the Fife and Drum Corps during an arrival ceremony on the South Lawn of the White House on Sept. 23, 2015. (Jim Watson, AFP/Getty Images)
President Barack Obama welcomes Pope Francis to the White House on Sept. 23, 2015. (Vincenzo Pinto / AFP-Getty Images)
President Barack Obama welcomes Pope Francis to the White House on Sept. 23, 2015. (Vincenzo Pinto / AFP-Getty Images)
President Barack Obama welcomes Pope Francis to the White House on Sept. 23, 2015. (Mandel Ngan / AFP/Getty Images)
Pope Francis and President Barack Obama shake hands during an arrival ceremony on the South Lawn of the White House on Sept. 23, 2015. (Michael Reynolds / EPA)
President Barack Obama and first lady Michelle Obama greet Pope Francis during an arrival ceremony on the South Lawn of the White House in Washington on Sept. 23, 2015. (Mandel Ngan / AFP-Getty Images)
Pope Francis greets well-wishers as he departs the Apostolic Nunciature, the Vatican’s diplomatic mission in Washington, on Sept. 23, 2015. (Cliff Owen / AP)
Marine guards stand waiting to open the south portico doors at the White House before Pope Francis arrives for a ceremony on the South Lawn of the White House in Washington on Sept. 23, 2015. (Pablo Martinez Monsivais / AP)
A man holds up a Holy See flag as he waits for Pope Francis’ departure from the Apostolic Nunciature, the Vatican’s diplomatic mission in Washington, on Sept. 23, 2015. (Cliff Owen / AP)
Vice President Joe Biden, from left, Jill Biden, Ethel Kennedy and Secretary of State John Kerry wait for the arrival of Pope Francis before a ceremony on the South Lawn of the White House on Sept. 23, 2015. (Pablo Martinez Monsivais / AP)
Pope Francis’ waves as his motorcade departs Andrews Air Force Base in Maryland on Sept. 22, 2015. (Andrew Harnik / AP)
Spectators hoping for a glimpse of Pope Francis wave Holy See and U.S. flags on the South Lawn of the White House on Sept. 23, 2015. (Pablo Martinez Monsivais / AP)
Pope Francis and President Barack Obama wave to visitors at Andrews Air Force Base in Maryland on Sept. 22, 2015. (Michael Reynolds / EPA)
Military honor guards line up with U.S. and Vatican flags before the arrival of Pope Francis at the White House on Sept. 23, 2015. (Tony Gentile / AFP-Getty Images)
President Barack Obama greets Pope Francis upon his arrival at Andrews Air Force Base in Maryland on Sept. 22, 2015. (Mandel Ngan / AFP-Getty Images)
Pope Francis takes a photo with children whose parents work at the Lithuanian Embassy in Washington on Sept. 23, 2015. (Molly Riley / AFP-Getty Images)
Spectators wait as early as 5 a.m. along the parade route of Pope Francis around the Ellipse, south of the White House, on Sept. 23, 2015. (Astrid Riecken / Getty Images)
Pope Francis greets well-wishers outside the Apostolic Nunciature to the United States on Sept. 23, 2015, in Washington. (Molly Riley / AFP-Getty Images)
