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U.S. Planners See Shiite Militias as Rising Threat

Gen. David H. Petraeus and Ambassador Ryan C. Crocker have concluded that Shiite extremists pose a rising threat to the U.S. effort in Iraq, as the relative influence of Sunni insurgent groups such as al-Qaeda in Iraq has diminished drastically because of ongoing U.S. operations.

By Ann Scott Tyson

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