http://www.huffingtonpost.com/elizabeth-benedict/p...
A few years ago, I stumbled on a very colorful article from New York magazine about 9/11 conspiracy theories, "The Ground Zero Grassy Knoll." It included the work of one of the theorists, Nick Levis, who categorized our beliefs about why the attacks happened using what he called "HOP" levels.
After reading The Commission, which peels back much of the "ass-covering" that the actual Commission did in pursuit of its congressional mandate, I've given up my LIHOP-hood. I'm fully on board with the Incompetence Theorists.