Hannity interviewed Barrett a few weeks ago.
Yes, he is a fruitcake.
No, he is not qualified or trained to competently evaluate any single engineering element of 9/11.
So is Kevin Barrett the DUer who did the complex, high-tech chicken-wire experiment in his back yard?
I caught at least part of that interview, and as I remember he isn't even qualified to teach anything on this subject. His teachers training was in totally unrelated subjects.