building codes require builders to submit demolition plans BEFORE construction begins ..as for the Pentagon, "Granit" missile from the sunken Russian submarine "Kursk"
if anons don't trust scibd..just search for the title
https://www.scribd.com/document/170266922/9-11thology-The-third-truth-about-9-11-or-Defending-the-US-Government-which-has-only-the-first-two