started, there was gray smoke, and i thought it was confetti flowing all over the place. >> fire and death, confusion below as some 10,000 people screened out of the building. >> that was a lady that had a bit gash in her head. >> witnesses reported a horrifying scene. desperate people jumping from the burning skyscrapers. bloody clothing and body parts scattered on the streets below. as emergency crews rushed to the southern tip of manhattan, the median thought, could it really be happening again? >> step back okay. >> in 1993, the same building was hit by a truck bomb, islamic militants hoping to topple the one tower into the other. six people died in that attack, and 1500 were injured. full within the first minutes today, it was clear that the toll this time would be much higher. then, at 9:03, less than 20 minutes after the first strike,