Many people are commenting on Morgan Reynolds's comments that the WTC collapse was controlled demolition and not the planes flying into the towers. Let's take a look at some facts...
Almost every engineering school in the country has either been looking into the collapse or using it as a case study. No college (not even Texas A&M who released this statement) has gone on record saying anything different about the collapse. This means either they are correct or the next generation of engineers who will be building our buildings aren't qualified to put up woodsheds. I find it unlikely that we've universally trained a generations of idiots incapable of understanding gravity, at least not at the college level. K-12... well... let's not go there.
Dr. Reynolds has a degree in economics. It's simply not accurate to call him a liberal as he writes in support of concealed carry, privatization and other conservative or at least pro-capitalist issues for the Heartland Institute. He was or is also a member of the National Center for Policy Analysis, which isn't exactly a Soros-Approved 527. In fact, he apparently once wrote an article for the National Review.
In order to have a controlled demolishing of a building, it requires a large effort that would be very hard to keep secret and certainly take very long to set up if it were to be kept secret. For instance, there would be no way to set it up in 8 months if it were Bush or someone who came to office with him. I know, however, if I saw people carrying boxes of dynamite in the building back when I was working in the Sears Tower, I would have started working from home.