21.   Colleagues said he disappeared in the rubble when the south tower collapsed, just moments after he tried to help a woman who had fainted.

22.   Compounding the tragedy was the suspicion that scores of emergency workers who rushed to the World Trade Center were crushed when the towers collapsed.

23.   Even when the towers collapsed, I felt you were out.

24.   Everyone watching at home on television had known within minutes when the towers collapsed.

25.   Graham and Dee Howard were in an ambulance at the edge of the World Trade Center when a tower collapsed, forcing them to run for their lives.

26.   He was helping to evacuate employees when the towers collapsed.

27.   He was standing on Nassau Street in Manhattan when the first tower collapsed.

28.   Hundreds of thousands of workers remained calm as they evacuated downtown, walking quietly uptown and across bridges, even as the towers collapsed behind them.

29.   However, they have not said why or how the tower collapsed.

30.   In a separate court matter, ACOG and the design team were sued by a stadium construction worker who was injured when a light tower collapsed.