Pope Francis said a prayer of remembrance at an interfaith ceremony at the Sept. 11 museum in New York Friday.

He asked God for eternal peace for those killed, as well as healing for the relatives of the nearly 3,000 people killed in the 2001 terror attacks in New York, at the Pentagon and in a field in Pennsylvania. He spoke near the underground flood wall that separates lower Manhattan from the Hudson River and held fast during the 2001 terrorist attacks. The wall sits just next to what is known as the "Last Column," the final steel beam removed during the recovery after the attacks on Sept. 11, 2001.

And he prayed to God to bring "peace to our violent world" and to "turn to your way of love" those who justify killing in the name of religion.

Religious leaders from many other faiths spoke on the need for peace and giving prayers.

Eighteen relatives of people who died in the attacks heard the pope's remarks.