joining me jeffrey toobin and david sousie and a ntsb train member. and now we know it was going through the turn and there are questioning and what are the factors that you as an investigator would want to look at right now? >> well, you know, 11 or 12 minutes out of the station to be going that fast, i would want to know and the recorder should tell us that, just what the throttle settings were. did he go full throttle when he left the station? how did we get that fast in a short period of time. there are people that have started to look at the performance of the locomotive which we published and to see if it is capable of pulling those trains in that distance, that speed and what he had to do to get there. that is one piece. there are people looking at the electronic control arm of the train to see did we have a runaway train was it the acceleration not under the operator's control. >> and that can be determined -- >> yes, that can be determined. and locomotives today are mini computers. there are computers all over them, running systems and we hav