It's a gravity thing the penthouse is full of very heavy stuff and lots of water. It fell on the left starting a chain reaction the dropped the top floors on to the weakened lower floors. just gravity at work.

mikell

THNX mike now that makes sense.

[edit on 19-3-2007 by piacenza]

Yeah its an easy one because heavier objets fall faster that lightweight ones!!!

In another Universe !!!

WTC7 was demolished along with all the imposrtant data inside...cover up?

BETCHA!!!

Wasn't wtc7 damaged at the bottom?

It could be because one or two columns failed first, leading to more columns having too much weight on them, leading to the penthouse to collapse, followed by the rest of the building collapsing.

Could it be that there were no bombs in 7?