6.9?? I think this one is clearly underrated...
For me "Green Zone" is one of the best modern-war movies of the last 10 years, if not the best. A good story, lots of realistic action, fabulous acting, powerful characters, great locations... and a mind blowing background based on the real causes of the Iraqi war.
The only thing I didn't like is the excessive grainy image, which I guess was intended for giving it a more realistic touch, but IMO punishes the viewing experience. But this is completely secondary.
I gave it a 10. Paul Greengrass is one of the best active directors. Green Zone, The Bourne saga and Captain Philips are not a mere coincidence.