According to a document released by the Department of Homeland Security and posted to Scribd by Huffington Post reporter Andrea Stone, words and phrases ranging from "nuclear" to "ice" are used as search terms by DHS to detect potentially dangerous incidents, such as acts of terrorism, extreme weather, traffic accidents, and hazardous spills. The terms come from a 2011 binder that guides DHS analysts working on the agency's "Media Monitoring Capability Mission" (MMC), DHS's effort to cull clues from open sources -- such as Twitter, media reports, and news stories -- to develop what it calls "situational awareness."
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