Pope Francis delivers inaugural Mass

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  • Pope Francis celebrates his inaugural Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. (AP Photo/Dmitry Lovetsky)

  • Argentina's President Cristina Fernandez, right, attends Pope Francis' inaugural Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. (AP Photo/Andrew Medichini)

  • Pope Francis holds his pastoral staff as he celebrates his inaugural Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis has officially begun his ministry as the 266th pope, receiving the ring symbolizing the papacy and a wool stole symbolizing his role as shepherd of his 1.2-billion strong flock. (AP Photo/Dmitry Lovetsky)

  • Priests deliver communion under umbrellas to the faithful in St. Peter's Square during the inauguration Mass for Pope Francis at the Vatican, Tuesday, March 19, 2013. (AP Photo/Gregorio Borgia)

  • Pope Francis holds the pastoral staff as he celebrates his inaugural Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis has urged princes, presidents, sheikhs and thousands of ordinary people gathered for his installation Mass to protect God's creation, the weakest and the poorest of the world. (AP Photo/Andrew Medichini)

  • Pope Francis celebrates his installation Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis has urged princes, presidents, sheikhs and thousands of ordinary people gathered for his installation Mass to protect God's creation, the weakest and the poorest of the world. (AP Photo/Dmitry Lovetsky)

  • Pope Francis waves as he holds the pastoral staff in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis has urged princes, presidents, sheikhs and thousands of ordinary people gathered for his installation Mass to protect God's creation, the weakest and the poorest of the world. (AP Photo/Dmitry Lovetsky)

  • Priests line up in St. Peter's Square for Pope Francis' installation Mass, at the Vatican, Tuesday, March 19, 2013. Pope Francis has urged princes, presidents, sheikhs and thousands of ordinary people gathered for his installation Mass to protect God's creation, the weakest and the poorest of the world. (AP Photo/Andrew Medichini)

  • Priests pray during the Mass for the inauguration of Pope Francis in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. (AP Photo/Alessandra Tarantino)

  • Pope Francis waves as he arrives in St. Peter's Square for his inauguration Mass at the Vatican, Tuesday, March 19, 2013. (AP Photo/Michael Sohn)

  • Pope Francis kisses a child in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. Pope Francis officially began his ministry as the 266th pope on Tuesday in an installation Mass simplified to suit his style, but still grand enough to draw princes, presidents, rabbis, muftis and thousands of ordinary people to St. Peter's Square to witness the inauguration of the first pope from the New World. (AP Photo/Riccardo De Luca)

  • Crowds gather in St. Peter's Square during the inauguration of Pope Francis at the Vatican, Tuesday, March 19, 2013. A priest delivers communion to the faithful in St. Peter's Square during the inauguration Mass for Pope Francis at the Vatican, Tuesday, March 19, 2013. Pope Francis urged princes, presidents, sheiks and thousands of ordinary people gathered for his installation Mass on Tuesday to protect the environment, the weakest and the poorest, mapping out a clear focus of his priorities as leader of the world's 1.2 billion Catholics.(AP Photo/Oded Balilty)

  • Pope Francis walks past the alter in front of St. Peter's Basilica in St. Peter's Square following his inauguration Mass at the Vatican, Tuesday, March 19, 2013. (AP Photo/Gregorio Borgia)

  • A woman with her face painted in the colors of the Argentine flag and Vatican flag cheers as she waits to watch a live broadcast of Pope Francis' Vatican installation Mass on a big screen outside the Metropolitan Cathedral in Buenos Aires, Argentina, Tuesday, March 19, 2013. Many spent the entire night holding vigil before Tuesday's Vatican ceremony began, hours before dawn Argentina time. Argentine's former cardinal Jorge Mario Bergoglio was chosen as leader of the Catholic Church on March 13. (AP Photo/Natacha Pisarenko)

  • In this photo released by Brazil's Presidency, Pope Francis greets Brazil's President Dilma Rousseff on the day of his installation Mass in St. Peter's Square at the Vatican, Tuesday, March 19, 2013. (AP Photo/Roberto Stuckert, Brazil's Presidency)

  • This photo provided by the Italian Police Press office shows an aerial view of Saint Peter's Square prior to the start of the installation Mass of Pope Francis at the Vatican, Tuesday, March 19, 2013. Pope Francis has urged princes, presidents, sheikhs and thousands of ordinary people gathered for his installation Mass to protect God's creation, the weakest and the poorest of the world. (AP Photo/Matteo Losito, Italian Police HO)

  • Associated Press photo by Angelo Carconi -- Pope Francis is driven through the crowd Tuesday in St. Peter's Square as he arrived for his inauguration Mass at the Vatican.