11.   A man, barely clinging to life, was found beneath the debris in the basement of the north tower.

12.   A half-hour later, most of the north tower crumbled.

13.   A little more than hour later, the south tower collapsed, and the north tower folowed it.

14.   A pile of ID cards was found in the rubble of the north tower.

15.   A piece of the television antenna from the north tower.

16.   A ramp for construction equipment is below ground level, and rests on the remains of the underground supports of the north tower.

17.   Additionally, eight people described conditions just below the impact zone in the north tower.

18.   After the first airliner hit the north tower, people stampeded in fear, some so fast they ran out of their shoes.

19.   After the plane struck the north tower, he called again, saying that he was evacuating the building and that he would call again when got downstairs.

20.   Against the Manhattan skyline, the gleaming towers looked nearly identical, except for the television tower atop the north tower.