US Soldiers Have a New Enemy: Mercenaries Paid With US Tax Dollars

The colonel was furious. "Can you believe it? They actually drew their weapons on U.S. soldiers." He was describing a 2006 car accident, in which an SUV full of Blackwater operatives had crashed into a U.S. Army Humvee on a street in Baghdad's Green Zone...

http://www.dailykos.com/storyonly/2007/10/12/105744/13