A commenter on another blog ...

"...has some lucid thoughts on Iraq - especially at the end.

The tragedy of the event is manifest. In any case, as I stated before, COIN is inherently a very tough nut to crack, and a VERY personal war. It certainly varies from city to city, but I know Samarra personally and I can attest to the dangers of the place. Yes, the responsibility can be placed upon the soldiers. Was it within the rules of engagement (was the warning escalated properly, did the soldiers attempt to stop the car, etc?). I can only speculate on legality, but we faced situations like this before (panicky civilians speeding through clearly labled checkpoints, with wounded and dead resulting, albeit very seldom). The consequences of even legal and sanctioned violence at the soldier can have strategic ripple effects (as we see in this case).

CounterColumn

Well this lucid commenter basically concludes that it's an administrative failure, fancy that.