http://www.estripes.com/article.asp?section=104&article=30020A uniformed Iraqi with all the proper credentials walks up to an armored Humvee in Hawijah, levels his AK-47 at the window and fires off a clip, seriously injuring a U.S. servicemember.
The evening before, in Sulaymaniyah, U.S. forces learn of an imminent attack on their forward operating base. Nearly a dozen Iraqi soldiers, including several on gate duty that night, are subsequently arrested as co-conspirators.
“They were going to kill us in our sleep,” one soldier later said.
Around that same time in May, Iraqi soldiers are ambushed on a bridge spanning a railroad yard in Beiji. At least three soldiers in the unit, call them sleepers or spies, are believed to have played a role in the scheme.
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Figuring out which Iraqi security forces are trustworthy and which are not is one of the greatest challenges American troops face in Iraq. The specific number of attacks on friendly forces involving infiltrators is unknown, but it easily exceeds what American forces experienced in places such as Somalia, Bosnia or Afghanistan.