Wait a minute!  Didn't the mayor, in a prior statement, say that he was inside one of the buildings with rescuers and was told to get out because the building was about to fall?  Now, he's claiming he was outside with police and didn't see the clip til many hours later?

There's no such thing as a perfect crime... somebody didn't count on so many 'perfect idiots' to expose their prior knowledge.  Oops!