. >> let's go to pat dawson who is down by the world trade center. >> reporter: there are probably at would say, hundreds, perhaps in the thousands of emergency workers who in the last hour and a half have managed to work their way down here to lower manhattan and basically tried to get into this fray. we are standing right here about 10 to 12 blocks north of the world trade center. these firemen that you can see, firefighters, firefighters are walking down towards the site now and they literally have been arriving by the dozens over the past hour or so as we say probably in excess of 1,000 or more emergency workers from new york city and surrounding areas converging on this site now to try to make some sense of it. as you can imagine, at this point, there is a certain level of chaos, because they are just trying to sort out who is alive and who is not. when i asked one of them why he was going back in as he suited up, since he could barely breathe, he said because it's my job and there may be some of my brother officers in there. and as you can see from these pictures the amount of d

pat dawson, excuse me, tom, is down at the scene. pat? >> where is wade? where is wade? >> pat, can you hear us? obviously there is pandemonium downtown. pat is not far from the world trade center, as you can hear from the sirens, and you can only imagine the confusion sdpert r and the terror that is in that area as the trade center towers have now collapsed. >> more than 100 stories of steel, concrete, electrical. that's a videotape replay. >> we are back at 10:30 eastern time on this tuesday morning, this horrific, incredible, not to be believed tuesday morning. you are looking at live pictures of the world trade center where just a few minutes ago, within the last minute, actually, the second twin tower collapsed. just to recap if you're just joining us around, a plane crashed into the right twin tower of the world trade center about two and a third down with tons of fire and billowing smoke. a second plane believed to be a 737 -- >> or 757, even. >> -- crashed into the second world trade tower. the plane was going from boston to los angeles. >> here's video, i think,