1.   From the devastated buildings and the crashing airplanes, people cried the most important words they could find.

2.   In addition to building more fire-resistant structures, another protection against crashing airplanes would be to keep the jet fuel from entering the interior of the building.

3.   Media-fueled nightmares of crashing airplanes, plunging elevators, and entire states shivering in the dark were far off the mark.

4.   Most of a crashing airplane would crumple on impact, McDonald said.