VATICAN CITY -- The Easter Sunday Mass in St. Peter's Square at the Vatican on April 5, 2015.
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A view of St. Peter Square at the Vatican as Pope Francis celebrates the Easter Mass, Sunday, April 5, 2015 (AP Photo/ Alessandra Tarantino)
Faithful wait in the rain for Pope Francis' arrival to the Easter Mass in St. Peter's Square at the Vatican, Sunday, April 5, 2015. (AP Photo/ Alessandra Tarantino)
Pope Francis salutes faithful in St. Peter's square at the Vatican, Sunday, April 5, 2015. (AP Photo/ Alessandra Tarantino)
Pope Francis delivers the Urbi et Orbi (to the city and to the world) blessing at the end of the Easter Sunday Mass in St. Peter's Square at the Vatican , Sunday, April 5, 2015. (AP Photo/ Andrew Medichini)
Pope Francis speaks before delivering the Urbi et Orbi (to the city and to the world) blessing at the end of the Easter Sunday Mass. (AP Photo/ Andrew Medichini)
Pope Francis speaks before delivering the Urbi et Orbi (to the city and to the world) blessing at the end of the Easter Sunday Mass. (AP Photo/ Andrew Medichini)
Faithful attend an Easter mass celebrated by Pope Francis, in St. Peter's square at the Vatican, Sunday, April 5, 2015. (AP Photo/ Alessandra Tarantino)
Pope Francis salutes as he arrives for an Easter mass, in St. Peter's square at the Vatican, Sunday, April 5, 2015. (AP Photo/ Alessandra Tarantino)