U.S. on heightened state of vigilance, but no threats exist, Napolitano says http://blog.chron.com/newswatch/2011/09/u-s-on-heightened-state-of-vigilance-but-no-threats-exist/ …
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U.S. on heightened state of vigilance, but no threats exist, Napolitano says http://blog.chron.com/newswatch/2011/09/u-s-on-heightened-state-of-vigilance-but-no-threats-exist/ …