If the US marines and Iraqi national guardsmen living at the Karmah military barracks near Fallujah talk at all, they speak through the bars of a small window. [snip] The sinister atmosphere at Karmah barracks is not difficult to understand. The marines are convinced that many, perhaps most, of the 140 members of the Iraqi National Guard (ING) they share the camp with are double agents working on behalf of the insurgents holding Fallujah. [snip] "We know when this place is about to come under mortar attack because the ING suddenly disappear," one marine said, staring across the dusty compound at two guardsmen smoking on a wooden bench. "We are supposed to be fighting together, instead we are sleeping with the enemy." In their bare dormitory angry guardsmen queue up to tell their side of the story, accusing the marines of arrogance, bullying and a cavalier disregard for civilian life. Twelve guardsmen spoke to The Daily Telegraph, but all refused to identify themselves, saying they feared reprisals from the marines.