Pope Francis stops to meet people after arriving at Philadelphia International Airport in Philadelphia, Saturday, Sept. 26, 2015. The Pope will spend the last two of his six days in the U.S. in Philadelphia as the star attraction at the World Meeting of Families, a conference for more than 18,000 people from around the world that has been underway as the pope traveled to Washington and New York.

Credit: (AP Photo/Susan Walsh)

Photos: Pope Francis visits Philadelphia

Pope Francis arrived in Philadelphia Saturday, Sept. 26, 2015. It’s his last stop on his tour of the U.S. He’ll spend his last two days at t…

(AP Photo/Ramon Espinosa)

Photos: Pope Francis Visits Cuba

Pope Francis arrives in Cuba September 19, 2015 before his historic trip to the United States on Tuesday, September 22. The entire trip to C…