Very good long article in the New York Review of Books by Mark Danner, which reviews some of the decision making over the years in Iraq. As a near instant-history, this is very useful.
To Americans the Iraq war seems to have entered its third and final act. Though the plans and ideas now will come apace, all of them directed toward answering a single, dominant question—How do we get out of Iraq? —none is likely to supply a means of departure that does not carry a very high cost. The present “sense of an ending” about Iraq has its roots more in American weariness and frustration than any real prospect of finding a “solution” or “exit strategy” that won’t, in its consequences, be seen for what it is: a de facto acknowledgment of a failed and even catastrophic policy.