Speaking on the final day of his first US trip Pope Francis used an address in Philadelphia to tell gathered bishops that 'God weeps' for the victims of clerical sexual abuse and those responsible will be 'punished'.
The Pope's comments came after he met with abuse victims and the day after he led a packed Mass at Madison Square Garden in New York.
The final Mass on Pope Francis' six-day US tour is expected to draw in crowds of more than 1.5m people on Sunday.
Speaking before flying back to Rome the pontiff's last American address will take place in Philadelphia and is expected to attract the biggest crowds of his whole trip.
Pope Francis' first US visit has sparked an unexpected craze among Americans - dressing dogs up in miniature versions of his papal garb.
A five-year-old girl managed to breach the Pope's security to deliver him an important letter.
Pope Francis is due to arrive in the US, but he will face a political test on Thursday when he addresses Congress.