Popular Culture and Propaganda

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Al Gore's documentary An Inconvenient Truth is explicit about taking sides on global warming.  With a hero who uses torture, the TV show 24 sends a message of a different kind. Entertainment and propaganda.  Do audiences distinguish between truth, fiction and political argument?   Also, Vice President Dick Cheney travels to Pakistan and Afghanistan and, on Reporter's Notebook, civil rights leader Al Sharpton is linked by slave ancestors to one-time segregationist Senator Strom Thurmond.