Pope Francis sits on board his plane bound for Rome after his six-day visit to the United States, in Philadelphia, Pennsylvania, September 27, 2015. REUTERS/Charles Mostoller TPX IMAGES OF THE DAY
Pope Francis sits on board his Rome-bound plane after his visit to the U.S. in Philadelphia, on Sept. 27, 2015.Charles Mostoller—Reuters
Pope Francis sits on board his plane bound for Rome after his six-day visit to the United States, in Philadelphia, Pennsylvania, September 27, 2015. REUTERS/Charles Mostoller TPX IMAGES OF THE DAY
A man looks at a television screen showing Pope Francis taking a pause as he celebrates mass at the Festival of Families Sunday mass along Benjamin Franklin Parkway in Philadelphia, Pennsylvania
A man holds a child as Pope Francis celebrates Mass, Sunday, Sept. 27, 2015, in Philadelphia. (AP Photo/Matt Slocum)
Pope Francis conducts a papal mass on the final day of events in Philadelphia, Pennsylvania
People without tickets watch on video screens, miles away from the altar and the secured area surrounding it, as Pope Francis celebrates mass in Philadelphia
Pope Francis waves to the crowd from the pope mobile during a parade along the Benjamin Franklin Parkway before Mass on Sunday, Sept. 27, 2015, in Philadelphia (AP Photo/Michael Perez)
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Nuns wait for Pope Francis' arrival at the Festival of Families rally along Benjamin Franklin Parkway in Philadelphia, Pennsylvania
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Pope Francis Rides In Motorcade Through New York's Central Park
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People in the crowds outside of St. Patrick's Cathedral take pictures in New York
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Pope Francis US Visit mass Canonization
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President Barack Obama, first lady Michelle Obama, and others, greet Pope Francis upon his arrival at Andrews Air Force Base, Md., on Sept. 22, 2015.
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Pope Francis sits on board his Rome-bound plane after his visit to the U.S. in Philadelphia, on Sept. 27, 2015.
Charles Mostoller—Reuters
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See Photos of Pope Francis' Historic Visit to U.S.

Updated: Sep 25, 2015 6:36 PM ET | Originally published: Sep 22, 2015
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