Here is a more recent article that does a nice job of pointing out the reasons to remain engaged in Iraq by those that consider such as the proper course of action. I personally have no predominant opinion and concede insufficient wisdom to know the best path for our nation. To me, it looks like "damned if you don't...damned if you do". I think it's inevitable that the US will be forced to take a major stand against radical Islam in some place at some point in time.
http://bcsia.ksg.harvard.edu/publica...e&item_id=1711