CNN The Situation Room May 13, 2015 22:30:00
Do you know? >> you know i don't know wolf. positive train control was something we worked on a lot when i was at d.o.t. it was mandated by congress so it's actually in the law that positive train control must be implemented not only by passenger rail but freight rail. it is an expensive item but, i know that amtrak was very near to having it implemented close to where this accident took place. i'm not precisely sure what the reason was that it wasn't -- had not been installed at the time of this crash. >> yeah, we just heard from robert the national transportation safety board that that train...
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