too dangerous for firefighters to fight it safely. they can only try to contain it. >> if they know nobody is inside, their best bet is to back away, keep the firefighters safe, evacuate the area and then let the fire burn out. >> it takes nine hours for the fire to extinguish itself. the facility looks like a war zone. but there are no casualties. >> in the end, all you lost is a building. if you saved the folks around and didn't injure or lose a firefighter, then it's a good day. a routine call has explosive results for a fire department.