Pope's apology stirs debate on infallibility [audio 7min]

Pope Benedict XVI's recent remarks on Islam provoked anger in the Muslim world, and led to a rare papal apology. In some circles, the pontiff's clarification of his remarks has prompted a debate on the concept of papal infallibility. Guest: Monsignor Kevin Irwin, professor of liturgy and sacramental theology, and Dean of the School of Theology and Religious Studies, Catholic University.