Awful. Just awful. They were throwing their children out of the windows in the hope that people would catch them below. Imagine being in that position, that's a last resort that you'd hope you'd never have to take.
One mother fled her apt with her 6 children, and when she got to the bottom there were only 4 with her. I cant imagine the pain and greif these people are going through.
I was very impressed and proud of the everyday citizens donating food, water and clothes and organizing shelter. A far cry from what i was told "the world" was like.
From what i understand the heat inside the twin towers reached astronomical levels due to the sheer hight and space for the hot air to move around inside that weakened girders. But, im no structural engineer.