1970. the technology is mature now. it can be implemented and, in fact, congress, congress has mandated this to be installed by the end of this year. >> seven years ago, 2008 safety act signed by george w. bush a bipartisan piece of legislation, mandates by tend of this year 2015, the inspector general looked at this and said there's no way that mark is going to be made. in march, the senate committee says we have to delay it. why is it being delayed? what's going on? >> well i think it would be best to talk to the railroads about that. i don't want to apologize tore their not implementing. but i do want to point out that they have literally spent billions of dollars trying to get ptc ready. there have been some technological issues. so i do believe the railroads are committed to doing. i think now they're in the situation of not having the time to do it. >> let's be clear here. this mandate applies both to amtrak, which is sort of a public-private partnership and