The Green Zone is pretty much the anti-Hurt Locker, high on star-power and social indignity, and the combined urge to search out reason and answers for big-picture questions too complicated and powerful to answer in a single 2-hour action flick. Loosely adapted from the book by former war reporter Rajiv Chandrasekaran, Paul Greengrass’s film takes place in Iraq at a time when President Bush was on an aircraft carrier declaring “Mission: Accomplished” while many American were starting to wonder just what that mission really was. Matt Damon plays one of those Americans, a chief marine officer charged with the acquisition of WMDs. Only every site his team hits is empty, a casualty of faulty intel. Damon wants answers. He wants the truth. But can he handle it?