Dancers from the Philadelphia Ballet perform for Pope Francis (R) as he attends the Festival of Families rally in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis receives a gift during the Festival of Families in Philadelphia on September 26, 2015. (Photo by Eric Thayer/The New York Times)





A priest kisses the hand of Pope Francis as the pontiff arrives on stage at the Festival of Families rally in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Marie Miller (R) performs for Pope Francis (rear, 2nd from L) as he attends the Festival of Families rally in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis attends the Festival of Families rally as a presentation about marriage is shown on a large screen behind him in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis attends the Festival of Families rally as a presentation about marriage is shown on a large screen behind him in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis attends the Festival of Families rally as a presentation about marriage is shown on a large screen behind him in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis attends the Festival of Families rally as a presentation about marriage is shown on a large screen behind him in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis (rear) listens to rock group The Fray as he attends the Festival of Families rally in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis applauds a dance performance at the Festival of Families in Philadelphia September 26, 2015. (Photo by Reuters)





Pope Francis gives a present to a boy as he attends the Festival of Families in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis embraces a man in a wheelchair after A Ukranian couple told him the story of their handicapped son as the pontiff attends the Festival of Families in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis (L) applauds as singer Aretha Franklin performs as he attends the Festival of Families rally in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis (rear) listens to the story of an Argentine family that emigrated to Canada while the pontiff attends the Festival of Families in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Pope Francis speaks at the Festival of Families in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)





Children bring a mural for Pope Francis to signs as he attends the Festival of Families in Philadelphia, Pennsylvania September 26, 2015. (Photo by Brian Snyder/Reuters)