Today on The Gist, a look at the issues surrounding police brutality, disengagement, and disarmament in cases like Eric Garner's. Eugene O'Donnell from John Jay College of Criminal Justice explains why we need a holistic review of policing. Plus, Colin Jones tells us the history of smiling in portraits. He's the author of The Smile Revolution. For the Spiel, why we're compelled by threats that are most certainly exaggerated. Get The Gist by email as soon as it's available: slate.com/GistEmail Subscribe to the podcast in iTunes: itunes.apple.com/us/podcast/slate…id873667927?mt=2

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