When extremist communities are banned from one website, they usually find another.
By Courtney Vinopal
Hate-filled online posts or “manifestos” have often been purposely left behind by shooters for the public and authorities to find. New York Times opinion writer-at-large Charlie Warzel, who covers information technology, joins to hari Sreenivasan to discuss the ‘gamification’ and…
By PBS NewsHour
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