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Where people are looking for safety in order to abuse them. we have to be wary and conscious of the fact that there are some people who don't have the best intentions, when they talk about taking refugees in. it is a speed issue, isn't there? getting there quickly, getting them into housing quickly, but also doing the necessary checks. are you worried that the trucks may fall by the wayside? >> i think because these conversation, the checks will happen, but it's less rigid nature of the refugee schemes. when people are coming in from overseas -- such as myself, there was a lot more scrutiny. t...

Senior writer John Oehser answers your questions.

And so if it is not a speed issue then one would have to go back and once again consider is there something wrong with the track? because something sent this very heavy engine flying at a high rate of spate so that so it would turn around and now there are two engine, one in the front and one on the rear. >> the national transportation safety board is dispatching a team to begin this investigation which could continue for a long time. all right, guys. we are going to continue our special coverage. stay with us right here on cnn. we'll take a quick break. we'll resume the breaking news coverage...

Unarmored vehicles, there was not overhead cover at the time of the ambush, so it does raise questions about resources. there have been comparisons draw, admiral kirby, of benghazi, that this is president trump's benghazi. is that fair or too premature? >> i think it's way too premature. i get the similarities here, you have a speed issue, and a resourcing issue, and could they have gotten help fast enough. i get that. it's a completely different situation, and i think we really all need to be careful before we jump to conclusions about what happened. there is an active investigation going on....

Conductor who may be going too fast -- >> are you speaking about this positive train control, is that the technology you're speaking about? >> right. that deals with the infrastructure failure which some people are wanting to have that conversation about infrastructure. it also deals with the human failure. it appears in this case -- we knew quickly there was a speed issue which we talked about yesterday morning that deals with the human failure. in this case speed. it will slow the train down. what's happened is people have changed the discussion to talk about high speed rail and other distra...