http://www.bbc.co.uk/blogs/theeditors/2007/03/02/index.html
Kinda answers all your questions, doesn't it?
If not, what's YOUR theory?
You have to admit, that's pretty "thin".
...the CNN reporter who had talked about the building "either collapsed or is collapsing" also had it clearly in shot behind him, but he acknowledged he couldn't see very clearly from where he was standing.