Read more of Kim Lawton's interview about Pope Benedict, the Vatican, and foreign policy with Father Thomas Reese, S.J., senior fellow at Georgetown University's Woodstock Institute.

Read more of Kim Lawton's interview about the Vatican and foreign policy with J. Peter Pham, director of the Nelson Institute for International and Public Affairs at James Madison University.

Read more of Kim Lawton's interview about the Vatican and foreign policy with Ambassador James Nicholson.

Benedict said that in Francis's hometown, the "city of peace," he felt a duty to make a heartfelt appeal for peace.