I think I've looked at every single video on the internet that has to do with controlled demolition, even European and Asian sites, and that's when I finally decided that the buildings had to have been brought down by explosives of some sort or another. It's interesting that I've only seen two top-down demolitions (not including the World Trade Center towers), about 8 all-at-the-same-time floors being exploded, and about 40 bottom up demolitions. They all share certain characteristics in common regardless of where the explosives were placed and timed to go off.
Great video, woofer. Thanks. Now if only Alex would watch it with an open mind. I dare anyone to look at this and if they didn't know that it was from 9/11 to say that this building wasn't being brought down by explosives but was just collapsing from weakening columns.