I worked with a company that did work on an installation where they made rocket / missile fuel, but beyond all the security checkpoints and terrifying NFPA Diam

I worked with a company that did work on an installation where they made rocket / missile fuel, but beyond all the security checkpoints and terrifying NFPA Diamonds (4 4 4 Explosive) were a series of buildings where the actual production happened. Every building had huge earthen berms along side with escape slides for employees to use in case of emergency. No real point but I could completely see the Chinese military making similar use of theirs.