Predicting Derailments News Today

D.c. subway plowing into another. and now a new york commuter train hurdling off the tracks. the crashes can have a number of causes. the one thing passengers can control, where they sit. a seat is safer than standing. and it matters which car you choose. take it from an expert, a former manager at the ntsb. >> usually when i ride the trains i try not to sit in the first car, not to sit in the last car. >> reporter: peter says the middle car gives you the best odds of being protected, if the tra...