Yea, took a look and saw this.... That's just plain crazy talk, right there. Nukes are not planted under every large building in America as a design measure to allow for future demolition. I really hope you don't believe that just because it's in black and white on some web site. What I see on that site you posted is the words of a dis-info agent who's attempting to lead people astray. Edited to add: If you want to know how those buildings came down, try starting with how an actual demolition company might do it.