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One of the most striking elements of today's threat picture is that plots to attack America increasingly involve American residents and citizens.

"Terror Threat 'Most Heightened' Since 9/11, Napolitano Says" by Jason Ryan and Devin Dwyer, abcnews.go.com. February 9, 2011.
One of the most striking elements of today's threat picture is that plots to attack America increasingly involve American residents and citizens.