the control cockpit or the engineer himself or her so and to essentially stop the train or to significantly slow it down. it's also designed to look for any type of obstructions on the track or any type of dense traffic that may take place, which this is not the place here. most importantly, the ntsb is being very careful because they need to look at what was happening when the train was approaching the curve. and if it was leaning over too much, neil, you could have possibly had some torsion and twisting with the tracks. the shows the cared twisted relative to each other and rolled down the embankment. without containment along the approach to the bridge, then that's why you had all the tumbling of the cars going down the embankment. more importantly, tumbling a car to another mode of