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9 of 25: FILE - In this Sunday, March 25, 2012 file photo, pilgrims cheer and sing as they wait at the site where Pope Benedict XVI will give a Mass in Bicentennial Park near Silao, Mexico. Pope Benedict XVI announced Monday, Feb. 11, 2013, he would resign Feb. 28 because he is simply too old to carry on. (AP Photo/Dario Lopez-Mills, File) (AP Photo/ Dario Lopez-Mills)

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