Pope Francis in New York

Pope Francis visits New York City on the second leg of his American visit which began September 24, 2015. Pope Francis is in the middle of a three-city tour of the United States that includes Washington, D.C., New York City and Philadelphia.

In this photo, Pope Francis enters Madison Square Garden to celebrate Mass attended by thousands in New York City on Friday, September 25, 2015.

Pope Francis in New York

Pope Francis celebrates Mass attended by thousands of the ticketed faithful at Madison Square Garden in New York City on Friday, September 25, 2015.

Francis travels to Philadelphia Saturday, September 26.

Pope Francis in New York

Pope Francis reads his homily while celebrating Mass at Madison Square Garden in New York City, September 25, 2015.

Pope Francis in New York

A woman cries as Pope Francis celebrates Mass at Madison Square Garden in New York City, September 25, 2015.

Pope Francis in New York

Pope Francis leads Mass attended by thousands of the ticketed faithful at Madison Square Garden in New York on Friday, September 25, 2015.

Pope Francis in New York

Pope Francis leads Mass at Madison Square Garden on Sept. 25, 2015 in New York City.

Pope Francis in New York

Nuns watch as Pope Francis celebrates Mass in Madison Square Garden, the last stop on the New York leg of his three-city American visit, September 25, 2015.

Pope Francis in New York

Pope Francis celebrates Mass at Madison Square Garden on September 25, 2015 in New York City.

Pope Francis in New York

Pope Francis rides in a golf cart as he arrives at Madison Square Garden to celebrate Mass in New York City on September 25, 2015.

Pope Francis in New York

Some 20,000 people attend the last event for Pope Francis' visit to New York at Madison Square Garden on September 25, 2015 in New York City.

Pope in Central Park

Tens of thousands of people watch Pope Francis ride in the popemobile through Central Park on September 25, 2015 in New York City.

Pope in Central Park

People cheer with tickets in hand as they head towards a security entrance to see Pope Francis in Central Park on September 25, 2015.

Eighty-thousand people won free tickets in a lottery system. A specially made 8-foot tall steel fence lines the park for the event.

Pope in Central Park

Tens of thousands of people who received free tickets have lined up to go through security to gather in Central Park since early in the day to see the Pope in New York City, September 25, 2015.

Pope in Central Park

A woman holds a sign asking, "Could the pope be the antichrist?" at Columbus Circle at the corner of Central Park were tens of thousands of people hope to catch a glimpse of Pope Francis before he heads to Madison Square Garden to celebrate Mass, September 25, 2015.

Pope in Harlem

Pope Francis talks with students as he visits Our Lady Queen of Angels School in the East Harlem neighborhood of New York City, September 25, 2015.

Pope in Harlem

Pope Francis touches a student's head as he visits Our Lady Queen of Angels School in the East Harlem neighborhood of New York City, September 25, 2015.

Pope in Harlem

Pope Francis arrives at Our Lady Queen of Angels School in East Harlem, in New York, September 25, 2015.

Pope in Harlem

Pope Francis receives a book from Shaila Cuellar (C) and Victor Franco ( R ) while visiting a classroom at Our Lady Queen of Angels School in the East Harlem neighborhood of New York City, September 25, 2015.

Pope in Harlem

Pope Francis accepts a cross from a woman at Our Lady Queen of Angels on September 25, 2015 in the East Harlem neighborhood in New York City. Pope Francis is on a six-day trip to the USA, which includes stops in Washington DC, New York and Philadelphia, after a three-day stay in Cuba. (Photo by John Taggart-Pool/Getty Images)

Pope in Harlem

School children take selfies with Pope Francis upon his arrival to the Lady Queen of Angels school on September 25, 2015 in New York City.

The Pope visited the inner city Catholic school in east Harlem and met with children, immigrants and Catholic Charities workers on the second day of his visit to New York City.

Pope in Harlem

Nuns lead school children in song before the arrival of Pope Francis to the Lady Queen of Angels school on September 25, 2015 in the Harlem neighborhood of New York City.

Pope Francis - 9/11 Memorial

Pope Francis visits the National 9/11 Memorial on September 25, 2015 in New York City.

Pope Francis - 9/11 Memorial

Pope Francis presides over an interfaith service as he visits the National September 11 Memorial & Museum in New York City on September 25, 2015.

Francis spoke in Spanish and said, "Here grief is palpable. The water we see flowing towards that empty pit reminds us of all those lives which fell prey to those who think that destruction, tearing down, is the only way to settle conflicts. It is the silent cry of those who were victims of a mindset which knows only violence, hatred and revenge. A mindset which can only cause pain, suffering, destruction and tears."

Pope Francis - 9/11 Memorial

Pope Francis (C) presides over an interfaith service as he visits the National September 11 Memorial & Museum in New York City, September 25, 2015.

Visibly moved by the his presence at the 9/11 Memorial, Francis said, "The flowing water is also a symbol of our tears. Tears at so much devastation and ruin, past and present." Francis remarked that meeting the family members of fallen first responders showed him "the power of love and remembrance," and "palpable sense of the heroic goodness which people are capable of."

Pope Francis - 9/11 Memorial

Pope Francis speaks during an interfaith prayer for peace at the National September 11 Memorial & Museum on September 25, 2015 in New York City.

Francis visited the 9/11 Memorial following his address at the United Nations.

Pope Francis - 9/11 Memorial

Pope Francis presides over an interfaith service as he visits the National September 11 Memorial & Museum for the September 11, 2001 attacks below the World Trade Center site in New York city, September 25, 2015.

Francis told the audience, "It is a source of great hope that in this place of sorrow and remembrance I can join with leaders representing the many religious traditions which enrich the life of this great city... For all our differences and disagreements, we can live in a world of peace. "

Pope Francis - 9/11 Memorial

Pope Francis attends an interfaith service for the victims of 9/11, National September 11 Memorial & Museum in New York City on September 25, 2015.

In his speech, Francis said, "In opposing every attempt to create a rigid uniformity, we can and must build unity on the basis of our diversity of languages, cultures and religions, and lift our voices against everything which would stand in the way of such unity." Together we are called to say "no" to every attempt to impose uniformity and "yes" to a diversity accepted and reconciled.

Pope Francis - 9/11 Memorial

Pope Francis attends a interfaith service for the victims of 9/11 in New York City at the National September 11 Memorial & Museum on September 25, 2015.

"Together we are called to say "no" to every attempt to impose uniformity and "yes" to a diversity accepted and reconciled," explained Francis.

Pope Francis - 9/11 Memorial

Here, Francis (C) attends an interfaith service for the victims of 9/11 at the National September 11 Memorial & Museum in New York City on September 25, 2015.

Pope Francis - 9/11 Memorial

Pope Francis greets religious leaders during an interfaith prayer for peace at the National September 11 Memorial & Museum on September 25, 2015 in New York City.

Pope Francis - 9/11 Memorial

Pope Francis visits the 9/11 Memorial & Museum in New York City on September 25, 2015 and prays at "Trying to Remember the Color of the Sky on That September Morning" by Spencer Finch. Behind the blue wall are the remains of many who perished at the World Trade Center site on September 11, 2001.

Pope Francis - 9/11 Memorial

Pope Francis visits the 9/11 Memorial & Museum in New York City on Friday September 25, 2015, escorted by former New York mayor Michael Bloomberg (L) and Timothy Cardinal Dolan (R) as they stand by a segment of the radio and television antenna that was atop the North Tower.

Pope Francis - 9/11 Memorial

Pope Francis holds the hands of New York Police officer, Terrance McGhee during his visit to the 9/11 Memorial in New York City, September 25, 2015.

Pope Francis visited the former World Trade Center site as part of his five-day trip to the United States.

Pope Francis - 9/11 Memorial

Pope Francis pauses to pray during a visit to Ground Zero on September 25, 2015 in New York City.

Pope Francis - 9/11 Memorial

Pope Francis prays at the edge of the South Pool at the World Trade Center in New York City, September 25, 2015.

Pope Francis - 9/11 Memorial

Pope Francis places a white rose on the names of 9/11 victims at the edge of the South Pool of the 9/11 Memorial in New York City on September 25, 2015.

Pope Francis - 9/11 Memorial

People wait at the Ground Zero south reflecting pool for Pope Francis who will attend an interfaith prayer service on September 25, 2015 in New York City.

Pope Francis - 9/11 Memorial

Pope Francis prays at the 9/11 memorial in New York City on September 25, 2015.

Pope Francis in New York

A woman holds flower and a picture of her sister, who died during the September 11 terrorist attacks, as she waits for Pope Francis to arrive at the 9/11 memorial in New York City on September 25, 2015.

Pope Francis, who has built a wide global following for his reform-minded views, is on a five-day official visit to the US.

Pope Francis - 9/11 Memorial

The Vatican flag and U.S. flag is seen on the names along the South Pool at the site where the World Trade Center stood, in New York City on September 25, 2015.

Pope Francis in New York

Roses placed by the mother of an architect who died during the Sept. 11 terrorists attacks sit atop his name on the edge of the South Pool at the World Trade Center in New York City, September 25, 2015.

Pope Francis will visit the memorial later in the day.

Rudy Giuliani

Former New York City Mayor Rudolph "Rudy" Giuliani stands at the Ground Zero south reflecting pool with his wife Judith Giuliani before Pope Francis visits for an interfaith prayer service on September 25, 2015 in New York City. F

rancis is to visit Ground Zero following his address at the United Nations.

Pope Francis at UN

Pope Francis addresses the United Nations General Assembly in New York City, September 25, 2015. It's the fifth time that a pope has visited the UN.

Pope Francis at UN

Pope Francis speaks at the United Nations General Assembly in New York City on September 25, 2015.

Francis told his audience that people must be allowed to be "dignified agents of their own destiny" in order to escape poverty.

Pope Francis at UN

Pope Francis arrives to the General Assembly of the United Nations on September 25, 2015 in New York City.

This is the fifth time a pope has addressed the UN. Francis is following in the footsteps of Paul VI, in 1965, John Paul II, in 1979 and 1995, and Pope Emeritus Benedict XVI, in 2008.

Pope Francis at UN

Pope Francis (R) poses with United Nations Secretary General Ban Ki-moon at the United Nations before his address to world leaders in New York City, September 25, 2015.

Pope Francis in New York

Pope Francis presides over evening prayers at St. Patrick's Cathedral in New York City, September 24, 2015.

Pope Francis in New York

Pope Francis (L) embraces Cardinal Timothy Dolan during vespers at St. Patrick's Cathedral in New York City, Thursday, September 24, 2015.

Pope Francis in New York

Pope Francis departs after presiding over evening prayers at St. Patrick's Cathedral in New York City, September 24, 2015.

Pope Francis in New York

A group of nuns take photographs as they await Pope Francis' celebration of evening prayers at St. Patrick's Cathedral in New York City, September 24, 2015.

Pope Francis in New York

New York City Mayor Bill de Blasio (L) and Senator Charles Schumer (D-NY) talk to schoolchildren ahead of the arrival of Pope Francis at St. Patrick's Cathedral for evening prayers in New York City, September 24, 2015.

Pope Francis in New York

Pope Francis enters St. Patrick's Cathedral in Manhattan, Thursday, September 24, 2015.

Pope Francis celebrated vespers, or evening prayers, and shared a reflection. The service was conducted before a congregation of men and women clergy, heads of archdioceses and special guests.

Pope Francis in New York

Police stand behind a security wall ahead of the arrival of Pope Francis at St. Patrick's Cathedral for evening prayers in New York City, September 24, 2015.

Pope Francis in New York

Crowds line the sidewalk as Pope Francis rides down Fifth Avenue in New York, September 24, 2015.

Pope Francis in New York

Pope Francis waves to the crowd as he rides down Fifth Avenue in New York, September 24, 2015.

Pope Francis in New York

People react as Pope Francis is driven down 5th avenue near St. Patrick's Cathedral in New York City, September 24, 2015.

Pope Francis in New York

Pope Francis waves to gathered crowds as he makes his way down Fifth Avenue towards St. Patrick's Cathedral in New York City on September 24, 2015.

Pope Francis in New York

Pope Francis walks down the aisle of St. Patrick's Cathedral in New York, as he arrives to celebrate vespers Thursday, September 24, 2015. The cathedral is the most visited by the pope outside of Italy.

Pope Francis in New York

Pope Francis reaches out to 5th grader Omodelei Ojo from Brooklyn as he is greeted by children upon arrival at John F. Kennedy International Airport Thursday, September 24, 2015, in New York City.

Pope Francis in New York

Pope Francis is given a pope doll as a gift as he greets well wishers after arriving at John F. Kennedy International Airport Thursday in New York City on September 24, 2015.

Pope Francis in New York

Pope Francis meets well wishers including Gerard Gubatan of Brooklyn, after arriving at John F. Kennedy International Airport Thursday, September 24, 2015, in New York City.

Pope Francis in New York

In this photo, Yankei Mauricio leads prayers while waiting in line to stand along 5th Avenue to watch as Pope Francis drives by en route to St. Patrick's Cathedral in New York City on September 24, 2015.

Pope Francis in New York

Nuns from the Little Sisters of the Poor cross Madison Avenue in New York City on September 24, 2015 as Pope Francis heads to New York City. He is set to arrive and hold a prayer service at St. Patricks Cathedral.

Pope Francis in New York

New York City police officers gather on 49th street ahead of the arrival of Pope Francis at St. Patrick's Cathedral in New York City on September 24, 2015.

Pope Francis in New York

Trevor Tucci, from St. James, NY, waits in line to stand along 5th Avenue to watch as Pope Francis drives by en route to St. Patrick's Cathedral on September 24, 2015 in New York City.

Pope Francis in New York

People wait hours before the arrival of Pope Francis behind a security fence along 51st Street, September 24, 2015.

Pope Francis is on a five-day trip to the U.S., which includes stops in Washington D.C., New York City and Philadelphia, after a three-day stay in Cuba.

Pope Francis in New York

A completed mural of Pope Francis is viewed on the side of a building in midtown Manhattan on September 21, 2015 in New York City.