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A crowd waits outside the Cathedral Basilica of Saints Peter and Paul to get a glimpse of Pope Francis as he arrives to celebrate Mass in Philadelphia on Saturday.

A crowd waits outside the Cathedral Basilica of Saints Peter and Paul to get a glimpse of Pope Francis as he arrives to celebrate Mass in Philadelphia on Saturday.

A crowd waits outside the Cathedral Basilica of Saints Peter and Paul to get a glimpse of Pope Francis as he arrives to celebrate Mass in Philadelphia on Saturday.