“Green Zone” looks at an American war in a way almost no Hollywood movie ever has: We’re not the heroes, but the dupes. Its message is that Iraq’s fabled “weapons of mass destruction” did not exist, and that neocons within the administration fabricated them, lied about them and were ready to kill to cover up their deception. Is this true? I’m not here to say. It’s certainly one more element in the new narrative that has gradually emerged about Iraq, the dawning realization that we went to war under false premises