CNN The Lead With Jake Tapper December 2, 2013 21:07:00
All of those will be investigated thoroughly. >> the fact that there was an accident close to this location, does that set off warning bells to you? >> oh, yes. yes. the ntsb will focus in on that, definitely, for track condition and geometry. >> in the curve, this went from 70 miles per hour to 30 miles per hour along this curve. it is one of the sharpest curves in the system. is it possible that it's just asking too much, do they have to perhaps look at the rules and regulations managing how trains go around a curve like this? >> well, there is a formula that's used and that's why the speed ...