Pope Benedict XVI greets pilgrims in St. Peter's Square at the Vatican, Wednesday, Feb. 27, 2013. Pope Benedict XVI greeted the Catholic masses in St. Peter's Square Wednesday for the last time before retiring, making several rounds of the square as crowds cheered wildly and stopping to kiss a half-dozen children brought up to him by his secretary. (AP Photo/Michael Sohn)

Associated Press
Pope Benedict XVI greets pilgrims in St. Peter's Square at the Vatican, Wednesday, Feb. 27, 2013. Pope Benedict XVI greeted the Catholic masses in St. Peter's Square Wednesday for the last time before retiring, making several rounds of the square as crowds cheered wildly and stopping to kiss a half-dozen children brought up to him by his secretary. (AP Photo/Michael Sohn)
Pope Benedict XVI greets pilgrims in St. Peter's Square at the Vatican, Wednesday, Feb. 27, 2013. Pope Benedict XVI greeted the Catholic masses in St. Peter's Square Wednesday for the last time before retiring, making several rounds of the square as crowds cheered wildly and stopping to kiss a half-dozen children brought up to him by his secretary. (AP Photo/Michael Sohn)
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