31 of 42: ALTERNATIVE CROP OF MXDL108.- Pope Benedict XVI waves to faithful as he is flanked by Mexico's President Felipe Calderon, right, and first lady Margarita Zavala, left, upon his arrival at the airport in Silao, Mexico, Friday March 23, 2012. Benedict's weeklong trip to Mexico and Cuba is his first to both countries. (AP Photo/Dario Lopez-Mills) (AP Photo/ Dario Lopez-Mills)

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