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Pope Francis arrives for his general audience in St Peter's square at the Vatican on September 18, 2013 . AFP PHOTO / TIZIANA FABI

Pope Francis waves after his general audience in St Peter's square at the Vatican on September 18, 2013 . AFP PHOTO / TIZIANA FABI

Pope Francis meets members of a Canine unit at the end of his weekly general audience in St Peter's square at the Vatican on September 18, 2013. AFP P...

Pope Francis meets members of a Canine unit at the end of his weekly general audience in St Peter's square at the Vatican on September 18, 2013. AFP P...

This handout picture released on September 16, 2013 by the Vatican press office shows Pope Francis (R) during a meeting with the Clergy of Rome at the...

This handout picture released on September 16, 2013 by the Vatican press office shows Pope Francis (C) during a meeting with the Clergy of Rome at the...

Pope Francis delivers a speech from the window of his apartment as it rains during his Sunday Angelus prayer in St Peter's square at the Vatican on Se...

Pope Francis delivers a speech from the window of his appartment as it rains during his Sunday Angelus prayer in St Peter's square at the Vatican on S...

Pope Francis addresses the crowd from the window of the apostolic palace overlooking St.Peter's square, as it rains, during his Sunday Angelus prayer...

Pope Francis addresses the crowd from the window of the apostolic palace overlooking St.Peter's square, as it rains, during his Sunday Angelus prayer...

Cardinal Angelo Amato, representing Pope Francis, offers an open air mass for the beatification of Argentine Father Jose Brochero (1840-1914) --aka "t...

Pope Francis waves to the faithful gathered in Aula Paolo VI at the Vatican as he arrives for his private audience to members of the Knights of the Ho...

Pope Francis waves to the faithful gathered in Aula Paolo VI at the Vatican as he arrives for his private audience to members of the Knights of the Ho...

Pope Francis looks to the faithful gathered in Aula Paolo VI at the Vatican during a private audience with members of the Knights of the Holy Sepulchr...

Pope Francis delivers a speech to the faithful gathered in Aula Paolo VI at the Vatican during his private audience to members of the Knights of the H...

Pope Francis waves to the faithful gathered in Aula Paolo VI at the Vatican during his private audience to members of the Knights of the Holy Sepulchr...

Pope Francis (L) meets with Thailand's Prime Minister Yingluck Shinawatra during a private audience at the Vatican on September 12, 2013. AFP PHOT...

Pope Francis (R) exchanges gifts with Thailand's Prime Minster Yingluck Shinawatra during a private audience at the Vatican on September 12, 2013. AF...

Pope Francis (R) poses with Thailand's Prime Minister Yingluck Shinawatra during a private audience at the Vatican on September 12, 2013. AFP PHOT...

Pope Francis (R) meets with Thailand's Prime Minister Yingluck Shinawatra during a private audience at the Vatican on September 12, 2013. AFP PHOT...

Thailand's Prime Minster Yingluck Shinawatra (R) meets Pope francis (back) during a private audience at the Vatican on September 12, 2013. AFP PHO...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270a) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270b) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270f) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270i) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270n) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270p) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270q) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270s) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270u) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270v) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Mandatory Credit: Photo by REX/AGF s.r.l. (3024270w) Pope Francis I Pope Francis I general audience in St Peter's Square, The Vatican, Rome, Italy -...

Pope Francis gestures upon his arrival in St Peter's square at the Vatican on September 11, 2013, for his weekly general audience. AFP PHOTO / FILI...

A cap fly next to Pope Francis upon his arrival in St Peter's square at the Vatican on September 11, 2013 , for his weekly general audience. AFP PH...

Pope Francis waves to pilgrims upon his arrival in St Peter's square at the Vatican on September 11, 2013, for his weekly general audience. AFP PHO...

Pope Francis waves to pilgrims upon his arrival in St Peter's square at the Vatican on September 11, 2013, for his weekly general audience. AFP PHO...

Pope Francis waves to pilgrims upon his arrival in St Peter's square at the Vatican on September 11, 2013, for his weekly general audience. AFP PHO...

Pope Francis waves to pilgrims upon his arrival in St Peter's square at the Vatican on September 11, 2013, for his weekly general audience. AFP PHO...

Pope Francis gives a speech at St Peter's square at the Vatican on September 11, 2013, during his weekly general audience. AFP PHOTO / FILIPPO MONT...

Pope Francis waves to pilgrims upon his arrival in St Peter's square at the Vatican on September 11, 2013 for his weekly general audience. AFP PHOT...

Pope Francis gestures as he speaks during his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo M...

Pope Francis gestures as he speaks during his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo M...

Pope Francis waves after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEFORTE

Pope Francis gestures after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEFORTE

Pope Francis kisses a believer after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEF...

Pope Francis points his finger after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEF...

Pope Francis leaves after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEFORTE

Pope Francis waves after his weekly general audience in St Peter's square at the Vatican on September 11, 2013. AFP PHOTO / Filippo MONTEFORTE

RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO/OSSERVATORE ROMANO" This handout picture released by the Vatican Press Office on September...

Pope Francis waves to the crowd next to cardinal Agostini as he leaves after a visit at the Astalli center on September 10, 2013 in Rome. AFP PHOTO /...