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Pope Benedict XVI is heped by his aide Guido Marini as he celebrates Christmas Mass in St. Peter's Basilica at the Vatican, Saturday, Dec. 24, 2011. (AP Photo/Andrew Medichini)

Pope Benedict XVI bids farewell

The Catholic Church awoke March 1 with no leader following the resignation of Benedict XVI, who pledged obedience to his successor and described himself as "simply a pilgrim" starting the final journey of his life.