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As days of riots seem to be coming to an end in Britain, people gathered to pray for unity in Tottenham, north London, Thursday. Karel Prinsloo/AP hide caption

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Karel Prinsloo/AP

Brooke Gladstone is host of the radio program, On The Media. She's the primary character in her new comic book, The Influencing Machine, that takes on the state of the media, past and present. W.W. Norton & Co. hide caption

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W.W. Norton & Co.