Offical explanation for twin tower collapses can be disproven in one word [View all]

Acceleration.

Simple physics: When one object (lets call it A) is dropped onto another similar, stationary object (B) the impact will cause A to slow down greatly. When a cue ball strikes a billiard bill, the cue ball is slowed drastically, and very noticeably, by the impact and quickly comes to a stop. I think we can all agree with this. No one in their right mind could disagree with this basic principle.

But the upper block (above the airplane impact zone) of the respective north and south towers is NOT decelerating as it falls and 'crushes down' the (much larger) lower block as we would expect. The upper block is actually speeding up, not slowing down at all as it falls toward the ground. Hence the official 'pile driver' explanation to explain the collapse of the twin towers is pure BS, because it violates every physical law known to man.

Unless the lower section of the towers were made of jello or toothpicks, the upper part should have slowed drastically as it impacted the lower part. But as plainly seen in the collapse videos, it is actually speeding up as it races toward the ground; moving through the more massive lower section as if it weren't even there.


Official FAQs, explaining the government's 'pile driver' theory for the collapse of the twin towers
(good for a laugh or two)

http://www.nist.gov/el/disasterstudies/wtc/faqs_wtctowers.cfm