Threat Level Changes
The HSAS threat level has changed 17 times as of September 2009. In August 2004, DHS began identifying specific sectors under possible threat, including aviation, financial services, and mass transit.
Read more about this topic: Homeland Security Advisory System
Famous quotes containing the words threat and/or level:
“A piece of advice always contains an implicit threat, just as a threat always contains an implicit piece of advice.”
—José Bergamín (1895–1983)
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To set himself against the peaks of snow
To lay them level with the running wave,
Nor is he overjoyed when they lie low,
But only grave, contemplative and grave.”
—Robert Frost (1874–1963)