The State Department can often times be so inward looking that it fixes the facts based on the policy need, making reality fit the vision whether that naughty reality wants to or not. Sometimes it's funny, sometimes it can be tragic.
Will Miller find WMD in Iraq? Will American reconstruction efforts in Baghdad go as planned in the face of growing insurgency? Of course not, but there are enough frenetic firefights to maintain a satisfying level of suspense.
Is The Green Zone a true liberal screed? Not really. Like a lot of recent films that are tagged as liberal, the film deals with moral absolutes and is tagged as left-wing by those who would disagree with the scenarios at play.
Can Matt Damon's half-fiction set the benchmark for a popular history of the Iraq war? Ultimately what gives the Green Zone its credibility is that it avoids any simplistic idea that Iraq could have simply been "got right."