I don't specifically recall the Fallujah clean-up, but I do remember the timidity with which we entered Sadr City the first time. That made me sad, but I understand they were restricted in a lot of things they could do to neutralize the enemy.
I seem to recall a sodlier being set up by the mainstreammedia in Fallujah. Shooting a wounded 'unarmed' man to death inside a mosque seems to ring a bell.
In Fallujah, after a period of waiting after a warning, it didn't matter where the enemy was, they were saught out and utterly destroyed. Same thing is about to happen in the Sadr city are of Bagdahd too imho.