These Are the People You Are Accusing : Part II
Another excerpt from Firefight, page 373:
For the first time, Regan's team saw something they had expected to see all along but had been scarce until then: recognizable airplane parts. They all thought they would find big pieces of the airliner laying everywhere, the way car parts end up strewn across a highway after a crash. But the physics of an airplane crash were obviously different: Mostly there was just tons of shredded metal and melted plastic.
Finally, they found several airplane seats, piled among the usual mounds of upturned office furniture and random wreckage. A couple of the seats still had bodies belted into them, which had already been found and marked for the FBI. Most of the workers inside were conscientious about not gawking, yet the seats attracted a lot of attention. They were the first objects the nonaviation experts had seen that unmistakably belonged to an airplane.