21.   Later, the second tower falls.

22.   My son began interrogating my husband about why the twin towers fell straight down instead of falling over or exploding.

23.   One lieutenant at the scene all day only realized both towers had fallen five hours after the fact.

24.   One who read it at his suggestion, Firefighter Vincent Panaro, was there when the towers fell and Feehan was killed.

25.   One year in training camp a photo tower fell on his head.

26.   She was about three blocks north when the southern tower fell.

27.   Several minutes later, they were on the street when the north tower fell.

28.   Since the towers fell, surely there is room in the cosmos for the small additional one that Buchwald mentioned.

29.   Several other senior commanders had already died earlier when the first tower fell.

30.   She had almost made it to the trade center when the first tower fell, he recalled.