In this image from video, a crowd mobs the silver Fiat carrying Pope Francis through Rio de Janeiro on Monday, July 22, 2013. Ecstatic believers forced the closed Fiat to stop several times as they swarmed around during the drive from the airport to an official opening ceremony in the center of the city. (AP Photo)
People wave to Pope Francis riding in a popemobile upon his arrival to Rio de Janeiro, Monday, July 22, 2013. Pope Francis returned to his home continent for the first time as pontiff, embarking on a seven-day visit meant to fan the fervor of the faithful around the globe. (AP Photo/Domenico Stinellis)
People reach out to Pope Francis as he rides in a popemobile through Rio de Janeiro, Brazil, Monday, July 22, 2013. Pope Francis returned to his home continent for the first time as pontiff, embarking on a seven-day visit meant to fan the fervor of the faithful around the globe. (AP Photo/Domenico Stinellis)
** FILE ** Pope Francis hugs a child after he delivered the Angelus prayer at the Pontiff's residence of Castel Gandolfo, near Rome, July 14, 2013. For a day, Pope Francis has abandoned his traditional Sunday greeting at the Vatican, opting for an informal front-door encounter in a hill town outside Rome which hosts the papal summer residence. (AP Photo/Gregorio Borgia)
** FILE ** Pope Francis celebrates a Mass with a chalice made from recycled wood from broken migrant boats, during his visit to the island of Lampedusa, southern Italy, July 8, 2013. (AP Photo/Gregorio Borgia)
Pope Francis holds the pastoral staff after he bestowed the Pallium, a woolen shawl symbolizing their bond to the pope, to 35 Archbishops, during a mass in St. Peter's Basilica, at the Vatican, Saturday, June 29, 2013. (Associated Press)
Pope Francis waves in St. Peter's Square at the Vatican as he leaves at the end of his weekly general audience on Wednesday, May 29, 2013. (AP Photo/Andrew Medichini)