Twitter Aids Rise of Web-Based Hate Forums, Report Finds

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Twitter Inc., the Web-based social-messaging service, helped spur a 30 percent growth in online forums for hate and terror over the past year, according to a report by the Simon Wiesenthal Center.

The center is currently tracking about 20,000 hate and terror-related sites, up from 15,000 a year earlier, according to a report set to be presented at a briefing in Washington, D.C., tomorrow.