Pope Francis blesses the faithful from the window of his apartment overlooking St. Peter's Square at the Vatican on Sunday, July 21, 2013. Francis leaves on Monday for Rio de Janeiro, where a million or more young Catholics are expected to celebrate the World Youth Day with their new pope. The trip is the first international journey for the 76-year-old Argentine since he became pontiff in March. (AP Photo/Andrew Medichini)

Photo by: Andrew Medichini

Pope Francis blesses the faithful from the window of his apartment overlooking St. Peter's Square at the Vatican on Sunday, July 21, 2013. Francis leaves on Monday for Rio de Janeiro, where a million or more young Catholics are expected to celebrate the World Youth Day with their new pope. The trip is the first international journey for the 76-year-old Argentine since he became pontiff in March. (AP Photo/Andrew Medichini)