>> well, it's important to just listen to what will actually just talked about, how sodium cyanide was detected within this blast site and further from the evacuation site as well. but that's just one of the many chemical compounds that are purportedly still remaining here at the tianjin blast site. and on top of that, we've been discussing this all night, basically, this calcium carbide. and if you do just a simple youtube search, you can see what calcium carbide does when mixed with water or simple rainwater, for instance. it's a substance that's used in pvc plastics. this is a port town and...