11.   Both towers of the trade center crumbled and several adjoining buildings collapsed or were severely damaged.

12.   Buildings collapse in America, too.

13.   Buildings collapsed and buildings burned.

14.   Every day, several buildings simply collapse.

15.   Fires raged, more buildings were collapsing, and no one could search, much less rescue.

16.   He had been notified of the problems but had not inspected them when the building collapsed.

17.   He tells of his surprise when both buildings collapsed completely.

18.   He was walking toward the lobby of the second trade center tower when the building collapsed.

19.   He was trying to evacuate people when the building collapsed.

20.   Hit hardest were the central and northern regions of the island, where high-rise buildings collapsed and roads and bridges crumpled.