11.   Parnass returned home only to witness the first World Trade Center tower collapse.

12.   She saw people jumping out of windows, the second tower collapse, papers from the building that had drifted to Brooklyn.

13.   She ran to the roof of her building in Chelsea and saw the huge tower collapse.

14.   She had seen a tower collapse.

15.   The group moved to a hotel library with a television, arriving just in time to see the first tower collapse.

16.   Watching the towers collapse on television, he said, he was overwhelmed by the task before him.

17.   Giuliani, who has been working around the clock since the twin towers collapses Tuesday, said the wedding meant a great deal to him.

18.   Residents all over the city could see the transmission tower collapse, putting Palestine TV off the air for about an hour.

19.   Residents all over the city could see the transmission tower collapse, putting Palestine TV off the air.

20.   They ran as the south tower came down in a huge cloud, and they soon heard the north tower collapse.