I grew up in the '80s where there's a lot of these kind of post-apocalyptic, post-comet, post-whatever it was, so that always captured my imagination a lot as a little kid, that idea of getting access to secret places and being able to roam around where you're not supposed to.
I was ordered not to go out to Abu Ghraib after dark early on, because Abu Ghraib was extremely dangerous.

