Tom Cruise divorce raises question: What is Scientology, anyway?

By Dan Gilgoff, CNN.com Religion Editor (CNN) -- News of Tom Cruise's split with Katie Holmes and questions about any role that Cruise's status as a Scientologist may be playing in the divorce have a lot of peopleWhen an ordinary mortal Tweets, his opinions usually have no more consequence than birdsong. If the Tweeter, though, is News Corp's chairman, the world sits up and listens: Rupert Murdoch is no bird. Thus, when Murdoch this past weekend Tweeted hisWhen

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