The correspondent from La Reppubblica has the details, reported from on board the airplane.
The Pope says every effort is being made to avoid any repetition of what happened before.
He said: "Pedophile priests will be completely excluded from the priesthood."
"We are profoundly ashamed and we will do everything possible so that this is never repeated in the future."
"It is more important to have good priests than to have many priests", the Pope underscored.
"If I read the stories of these victims, it is hard for me to comprehend how it was possible that priests would have betrayed in this way their mission to comfort, to give the love of God to those children"
"Never again pedophile priests."