location, what we are hearing now. the big blasts, sometimes in bursts of three is from the apc mounted .50 caliber. watch them chew away. i watched pieces of cement fall. i think they are rounds intended to be attention getters and square clearers in this case. it s been a downtown baghdad style barrage of gunfire. i, like richard have seen a couple people hit. a couple rounds to get everybody s attention. in terms of what you are able to assess about the situation overall, what is the overall momentum of the battle and what is it they are fighting for? are they trying to hold territory on the bridge? reporter: they are making shields out of sheet metal.