 DATE: When Lt. Hartman finally looses it after attacking the barge  and stalks toward the railroad tunnel, the armor support finally  arrives. Not just from across the bridge, but from the roadway  approaches to either side. Earlier when the Brigadier General stops  the tank bombardment to take the bridge, you can clearly see these  road approaches, and that there is no way to get onto them except  from another crossing upriver, downriver, or across this last  bridge.