11.   But the bigger burden of responsibility falls on Bush because the towers fell on his watch.

12.   But the tower did not fall immediately.

13.   By the time I reached the back of her apartment building, the second tower had fallen, the entire area covered by dust and smoke.

14.   David Egan, who lost two daughters, Samantha and Lisa, when the towers fell, learned this week that Samantha had been found.

15.   Engineers believe they have a general understanding of why the World Trade Center towers fell.

16.   Five weeks after the twin towers fell, four bin Laden associates were trooped into a courtroom and sentenced to life without parole for the U.S. embassy bombings.

17.   He narrowly escaped when the towers fell.

18.   He said that one of the lowest risks would be from inhaling asbestos fibers, if any were released when the towers fell.

19.   In fact, a tower fell over, creating a little fountain.

20.   Karey Robles, a college friend of Thomas Bley, got nervous after the towers fell because she knew Bley worked there.