Pope Francis, lower left, kisses his scripture book on the altar while celebrating Sunday Mass at Benjamin Franklin Parkway September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis concludes his tour of the U.S. with events in Philadelphia on Saturday and Sunday. (Photo by Matt Rourke-Pool/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (3rd L) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (3rd L) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (C) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis celebrates mass at the World Meeting of Families at Benjamin Franklin Parkway i(Credit: CJ Gunther-Pool/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (C) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (C) celebrates mass at the World Meeting of Families at Benjamin Franklin Parkway. (Credit: CJ Gunther-Pool/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
(credit: CBS)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. (Credit: Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis (C) celebrates mass during the World Meeting of Families. (Credit: Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
PHILADELPHIA, PA - SEPTEMBER 27: Pope Francis (R) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
PHILADELPHIA, PA - SEPTEMBER 27: Pope Francis (L) celebrates mass during the World Meeting of Families on September 27, 2015 in Philadelphia, Pennsylvania. Pope Francis wrapped up his United States tour with the World Meeting of Families Papal Mass during on the Benjamin Franklin Parkway. (Photo by Justin Sullivan/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis celebrates an open-air mass at the Benjamin Franklin Parkway in Philadelphia, Pennsylvania, on September 27, 2015. AFP PHOTO/JEWEL SAMAD (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis greets faithful as he celbrates Mass at Benjamin Franklin Parkway in Philadelphia. (credit: VINCENZO PINTO/AFP/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
Pope Francis celebrates Mass at Benjamin Franklin Parkway in Philadelphia, Pennsylvania, on September 27, 2015.. AFP PHOTO / VINCENZO PINTO (Photo credit should read VINCENZO PINTO/AFP/Getty Images)
Pope Francis Celebrates Mass On Philadelphia's Benjamin Franklin Parkway
PHILADELPHIA, PA - SEPTEMBER 27: Pope Francis delivers the homily as he celebrates mass at the World Meeting of Families at Benjamin Franklin Parkway iSeptember 27, 2015 n Philadelphia, Pennsylvania. This is the final day of a five-day trip to the USA, which includes stops in Washington DC, New York and Philadelphia, after a three-day stay in Cuba. Pope Francis added the Cuba visit after helping broker a historic rapprochement between Washington and Havana that ended a diplomatic freeze of more than 50 years. (Photo by CJ Gunther-Pool/Getty Images)
