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How companies like Twitter can identify terrorist or extremist accounts

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Twitter has vastly expanded its fight against extremism online. The San Francisco-based company says it has suspended 360,000 accounts for what it calls "violent threats and the promotion of terrorism."

Elizabeth Bodine-Baron is co-director at the RAND Center for Applied Network Analysis and System Science. She and a team recently performed a study of ISIS supporters and opponents on Arabic-language Twitter. She joined the show to give some perspective on how a social media company can determine which accounts to block — and if it can make a difference.

To listen to the full interview, click on the blue audio player above.