him. we saw dramatic pictures from the pentagon. let s go back to a few seconds ago. this is about an hour after the first impact. we saw dramatic footage of a portion of one of the twin towers, actually it appearing to fall away from the rest of the building. can we go to the tape now? here we go right here. i me, when you look at it, the building has collapsed. that tower just came down. let s go to bob who is at st. vincent s hospital. bob, what s ing on there? what can you tell us? katie, st. vincent s hospital is one of the hospitals closest to the world trade center. in the last few minutes ambulances have been coming in one right after another. most of the people they re bringing in have second and third-degree burns, very serious burn victims. th say the smoke inhalation people will probably be the most serious, but they re not even close to getting to them yet. there s a triage operation that s going on in the area. ambulances are being dispatched to every hospital in