In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Francis celebrates his inaugural Mass with cardinals, inside the Sistine Chapel, at the Vatican, Thursday, March 14, 2013. (AP Photo/L'Osservatore Romano, ho)

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In this photo provided by the Vatican newspaper L'Osservatore Romano, Pope Francis celebrates his inaugural Mass with cardinals, inside the Sistine Chapel, at the Vatican, Thursday, March 14, 2013. (AP Photo/L'Osservatore Romano, ho)