An omniscient piece of investigative journalism about the war in Iraq, as gut-wrenchingly depressing as it is quality. No time is wasted on what they call, on AM talk radio, “Bush Derangement Syndrome” (neither do the feds waste much time on Junior Soprano). The veterans — of the war and administration — are eloquent. The most incendiary easy shots are not taken. And most impressively, the filmmakers retain an appropriately bloodless sense of seriousness — instead of mockery — about the project. There is no sneering, no told-you-so puerile protest silliness, no pats on their own backs. There is no “gotcha” moment. There is nothing to be proud about with such a project. Pride is not the right word. Maybe someday we’ll find out what, entirely, we should feel about the whole damned thing.