Sociologist Barry Glassner, author of "The Culture of Fear: Why Americans Are Afraid of the Wrong Things," talks with Brian Stelter about how news outlets both stoke peoples' fears and "correct exaggerated fears and scares." He says local TV news has an especially serious impact. Glassner says many presidents have preyed on fears, but none to the degree President Trump has. And he offers advice about how to cover Trump's claims.
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