The film after 1.52 is literally explosive footage and really is quite shocking as usually there is some ambiguity. Before this you could muddy the waters and say debris caused the fall in some curious fashion. Or that the BBC made a mistake with there pre-news! I wonder if those relatives who produced the 'building what' campaign have seen this because you will not be seeing it on your TV anytime soon. It would be interesting to watch 'Popular Mechanics' try to debunk the footage with exploding toilets or radiators. A very powerful piece of evidence regarding foreknowledge of events that day.