Pope Francis reaches out to Catholic school student Omodelei Ojo of the Brooklyn borough of New York as he is greeted by children upon arrival at John F. Kennedy International Airport Sept. 24 in New York. (CNS photo/Craig Ruttle, pool)

Pope Francis waves to the crowd as he rides down Fifth Avenue in New York Sept 24. (CNS photo/Richard Drew, pool)

Pope Francis looks up as he arrives to St. Patrick’s Cathedral for an evening prayer service Sept. 24 in New York. (CNS photo/Paul Haring)

Pope Francis embraces a woman in a wheelchair as he arrives to celebrate vespers in St. Patrick’s Cathedral in New York Sept. 24. (CNS photo/Paul Haring)

Members of the Missionaries of Charity cheer as Pope Francis arrives to St. Patrick’s Cathedral for an evening prayer service Sept. 24. (CNS photo/Tony Gentile, Reuters)

Pope Francis gestures as Cardinal Timothy M. Dolan speaks during an evening prayer service with in St. Patrick’s Cathedral in New York Sept. 24. (CNS photo/Mike Crupi)

Pope Francis addresses the General Assembly of the United Nations in New York Sept. 25. (CNS photo//Mike Segar, Reuters)

Pope Francis addresses the General Assembly of the United Nations in New York Sept. 25. (CNS photo/Mike Segar, Reuters)

Pope Francis prays at the ground zero 9/11 Memorial in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis places a rose at the South Pool of the National 9/11 Memorial and Museum Sept. 25 in New York. (CNS photo/Tony Gentile)

Pope Francis greets a New York City police officer as he visits the ground zero 9/11 Memorial in New York Sept. 25.

Pope Francis joins representatives of religious communities for meditations on peace in Foundation Hall at the ground zero 9/11 Memorial and Museum in New York Sept. 25.

Pope Francis gives a reflection as he joins representatives of religious communities in Foundation Hall at the ground zero 9/11 Memorial and Museum in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis arrives at Our Lady Queen of Angels School in the East Harlem area of New York, Sept. 25. (CNS photo/Eric Thayer, pool)

A student shows Pope Francis a lesson on the environment during his visit to Our Lady Queen of Angels School in the East Harlem area of New York Sept. 25. (CNS photo)

Pope Francis talks to immigrant families during his visits to Our Lady Queen of Angels School in the East Harlem area of New York Sept. 25. (CNS photo)

Pope Francis meets students at Our Lady Queen of Angels School in the East Harlem area of New York Sept. 25. (CNS photo/Tony Gentile, Reuters)

Pope Francis rides through New York’s Central Park in the popemobile Sept. 25. (CNS Photo/Richard Drew, pool)

Pope Francis rides in a motorcade in New York’s Central Park Sept. 25. (CNS photo/Richard Drew, pool)

A statue of Mary is seen near the altar as Pope Francis celebrates Mass at Madison Square Garden in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis celebrates Mass at Madison Square Garden in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis raises the chalice of the Eucharist as he celebrates Mass at Madison Square Garden in New York Sept. 25. Also pictured is Cardinal Timothy M. Dolan of New York.(CNS photo/Paul Haring)

Pope Francis censes the altar as he celebrates Mass at Madison Square Garden in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis waves to the crowd at the end of Mass at Madison Square Garden in New York Sept. 25. (CNS photo/Paul Haring)

Pope Francis talks with members of the Sisters Adorers of the Precious Blood, an Argentina-based order from Brooklyn, N.Y., before he boards a flight at John F. Kennedy International Airport on his way to the World Meeting of Families in Philadelphia Sept. 26.