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Bill O'Reilly: I'm the only "watchdog" in TV news

Political commentator and author Bill O'Reilly, of "The O'Reilly Factor" on Fox News Channel, discusses his latest book, "Keep It Pithy: Useful Observations in a Tough World," claims he is the only one looking out for "the folks," and touches on immigration reform and his own political aspirations on "CBS This Morning."