indicator in a situation like this but the investigators are saying go slow on the speed, excuse the pun, because just because there's a curve doesn't mean there was excessive speed. the trains can go in excess of 100 miles an hour. but this is a residential commercial area. and it wasn't that far from the station. and that's relevant also yes? >> that is all relevant. you know they're going to look at -- everything is on the table. we say that all the time whenever you see these investigations are in their infancy. and that is the same case here. they will look whether speed was a factor but they will look at so many other things. >> and they have the black box you were saying right, just like a plane? >> yeah. the event recorders are on board the train. so that will have a very critical information about how fast this train was going, what were the brakes applied, when were they applied, all of that information will be matched up against what the speed limit is in this particular area. they'll even look at you know the crew the schedule what was their schedule the night before? did they get enough sleep? what did they do the night