On Sunday, Australia will have its own saint when Mary MacKillop, an Australian nun who died in 1909, is sanctified by the Vatican. We speak with former Newsweek religion editor Kenneth Woodward about Catholic hagiography, the process of becoming a saint, and why it took over 100 years for MacKillop. Woodward is the author of "Making Saints: How The Catholic Church Determines Who Becomes A Saint, Who Doesn't, And Why."

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