yesterday, do you think it was human error, mechanical error? are you moving in one direction or the other? >> well, wolf, first of all, we're so sad to hear about the eighth victim terribly sad for his family. his or her family i should say. i know there's speculation about who it might be but we're thinking of them. and i appreciate the expressions of condolence from across the country for our state and what happened in the last couple of days. number one i'd say, wolf we don't know for sure obviously when a train is going that much above the speed limit, 106 miles an hour that can only be trouble. but i don't know until i hear from the investigators how that happened and why that train was going that fast. >> the crash could have been prevented, as you know senator, if that automated speed control