Don't worry, you're not gullible (Well, you might be, but not in this case
Have you ever seen a jet plane crash site? In life or in pictures? You'll notice there isn't much of a plane left. If you're thinking of "wreckage" as massive bundles of heavy metals hurtling through midair, think again. The only parts of an aircraft blown up seconds before impact which would pose a serious threat would be the engines. The rest of the plane would be instantaneously reduced to fireworks. Imagine towing a peice of paper through midair and then cutting the tow-line. It would stop moving forward almost instantly. An exploded airplane would slow at a phenomenal rate, in fact more than 75% of it wouldn't be going forward at all any more. Only the nose area of the fuselage and some smaller parts of the wings would be moving forward, and in shards. They would blast through the outter windows, and perhaps some outter layers of steel. They might rip the floors open a bit if they cought them edge-on, and they would litter some fire here and there. The damage would be comparable to scalding yourself with hot water and watching the red spot swell up and then die down. The engines, in the mean time, would be spinning-razor death traps. They would hurl themselves into the building like house-sized bullets. Bullets, however, are solid and aerodynamic, and beleive it or not, jet engines aren't
aerodynamic. Once they stop running, they become lead weights hanging from an airplane's wing, creating enormous drag. In the event described, they would still be spinning, and thus moving themselves forward. As soon as they met the building, however, that spinning would get chopped up and choked, and they would destinigrate in every outward direction, having very little actual penetration of the structure. The rest of the debris would fall down the building, some breaking an occasional window, most of it hitting the ground. Even with the Sept. 11th attacks, the damage caused just by the impact was relatively small, as seen in any of the penetration-area photographs. Not more than three or four floors were damaged by the initial ripping action.