When Boston officials decided to monitor Twitter during this years marathon, they didnt scan the sites 500 million daily posts for signs of trouble. Dataminr did that for them. The companys software sorts through millions of tweets for clues about major events or emerging threats, flagging mentions of everything from fires to suspicious packages and sending real-time alerts to customers. Dataminr has been quietly working with public safety officials in Boston and three other cities with the aim of detecting potential criminal or terrorist activity bubbling up on Twitter before it happens. …
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