Pope Francis wraps up historical visit to the U.S.

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PHILADELPHIA - Wrapping up his U.S. tour, it was a somber Sunday as Pope Francis met with a small group of victims of clergy sexual abuse.

In a morning gathering with bishops, the pope said "god weeps for the sexual abuse of children," and he is "overwhelmed by shame" at clergy who violated trust.

He also committed to careful oversight to ensure that youth are protected and to hold offenders accountable.

Then the pope went to jail, Curran-Fromhold Correctional Facility, where he visited inmates. That's a first for any pope in the U.S.

They listened as he related that "all of us need to be cleansed."

Saturday night, the tone was more lighthearted as thousands gathered at the festival of families in Philadelphia to hear the pontiff speak.

Before taking the podium, Pope Francis was welcomed with the voice of an angel. 14-year-old Bobby Hill from the Keystone State Boychoir sang an opera solo. Young bobby got a standing ovation afterward and presented the pope with a gift.

His performance couldn't resist a comment from the emcee of the event, actor Mark Wahlberg. He said, "that right there was truly the voice of an angel. But then he whispered in my ear that he loved the movie 'Ted.' (laughter) I told him that was not appropriate for a boy of his age. (laughter) Holy Father, please forgive me. (laughter)"