User blog comment:Furbearingbrick/NEW RULE, EVERYONE/@comment-5422312-20130111022937/@comment-4099220-20130111025159

I've seen pictures of both wooden and metal doors (specifically from pictures dating back from when my great grandfather secured, for lack of a better word, Auschwitz). So while there couldn't have been gas chambers with wooden doors, there were plenty of chambers with metal doors. Also, hydrogen cyanide can be neutralized so who's to say that the Nazis didn't rid the bodies of all lethal traces of Hydrogen Cyanide? They sure as hell didn't need their scientists to tell them that this was a feasible solution for handling.

As for the lack of schematics, I can't argue that seeing as I know nothing about that subject. I am curious, however, as to who this researcher was and what his level of credibility is.