CNN New Day Sunday August 23, 2015 11:34:00
Systems not just there but in the u.s. to something like this? >> they' ee're completely vulnerable. we don't have the boarding process to get on a train that we have with airplanes. it's a much easier target to get on. in europe particularly you just have so much train traffic. the network of trains, you know, it's the preferred method of travel by most europeans for nearby countries. in this case, amsterdam to paris, it's very logical to use a train instead of an airplane. and they're much more vulnerable. and the people are trapped. there's no running off the train if it's going 100 miles a...