Ptc Cannot News Today

Heard about the coming around the corner. listening to a media briefing led by amtrak president richard anderson. jo what do we know? >> reporter: pretty big news out of this. tom from nbc news asked a question about positive train control, whether or not it was implemented, and there was a one-word answer, no. and the reason that that is interesting and that matters in this situation is ptc or positive train control here can prevent train collisions, prevent derailment caused by excessive speed...