>> well it's not quite as cut and dried as all of that. in fact, if i could add some texture on some of your earlier discussion congress has already authorized what they call positive train control system to be in by the end of the year. the truth is, they already have something called automatic train control and that's what the ntsb and fra is insisting be put in place when they put this line back in place. automatic train control is what they call it, and it's something that is not quite as comprehensive as positive train control but it would have prevent this had tragedy and it is available now. they're going to put that in on the northbound line. another thing that's interesting is people say, well, you know the train engineer wasn't hit by a projectile. they would have known it if he had been obviously.