I spent a couple of days glued to the TV watching it all unfold,as I was on holiday,and there was definetly no mention of explosives,and the tower collapsed from the top stories i.e. where the planes hit(and they both had windows)and the bottom floor was the last to go.I have seen a few "doctored" clips,but they are not genuine.Ignorance is abundant on this forum ,but not in my post.
