31.   She was standing on the Brooklyn Bridge when the first tower fell.

32.   Since the towers fell, there has been much debate about how the terrorist attacks and their aftermath will affect popular culture.

33.   That bubble was deflating even before the twin towers fell, adding fear to the mix.

34.   That means it is almost certain that the officers knew the south tower had already fallen and that they had been ordered to evacuate.

35.   The first issue was barely on the streets when the twin towers fell.

36.   The other tower fell about a half-hour after that.

37.   The other tower fell about half an hour after that.

38.   The towers fell after being struck by hijacked planes that ignited cataclysmic fires.

39.   The south tower had fallen.

40.   There were also calls for more powers for investigators seeking to understand exactly how the twin towers fell, to help prevent future collapses.