An AC-130 is the kind of weapons platform you don't use on a city...and BTW not all the residents in Sadr city are the bad guys.
Not really, we used it, or it's predecessors, in Vietnam. We used in cities in Panama, hitting a corner of the Comandancia, roughly their equivalent of the Pentagon. We used it in Fallujah. It's more of precision weapon than you might think. You can easily target and hit a single building.