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Our Lady of the Angels church reopens Saturday on Chicago's West Side as a new Catholic mission. A fire engulfed the parish school back in 1958. Ninety-two students and three nuns died. The tragedy forced a reform of school building and safety codes in Chicago and across the nation. The parish closed in 1991, and the building was rented to a Baptist church until 2009. Cardinal Francis George celebrates a rededication Mass at the church Saturday.