We all know Twitter is a place where you can follow the musings of just about anyone - in 140 characters or less.
But terror groups are increasingly using it too. The question now is whether Twitter is helping to self-radicalize people like the Boston bombing suspects.
Dan Rivers is OutFront in the investigation.
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Erin Burnett OutFront airs weeknights at 7 p.m. ET. Designed to showcase Erin's unique style--casual, smart, and confident--OutFront stays ahead of the headlines, delivering a show that's in-depth and informative.