http://physics911.net/generalpartinreport/

His resume is very impressive. The read sounded like he knows what he is talking about. If you're smart enough read and understand that it takes a bigger blast to knock out a column than a wall or floor. And IF smaller columns remain standing NEARER to the alleged blast source and larger columns are down
Farther From that blast source,, well, at that point, smart isn't so necessary,,,