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Pope Francis (R) celebrates mass with bishops, priests and seminarians at the Cathedral of St. Sebastian in Rio de Janeiro on July 27, 2013. Pope Francis joins young pilgrims in a prayer vigil on Rio’s Copacabana beach Saturday as he presses his drive to breathe new life into a struggling Catholic faith. Hundreds of thousands of Catholics attending the five-day gathering World Youth Day are set to walk nine kilometers across the city to reach the beach venue for the vigil. AFP PHOTO / GABRIEL BOUYS