The guy playing with his mouse, moving around the screen was making me dizzy and his voice was too monotone to keep me awake on this one. I will answer one of this questions if he didn't already answer it, after I fell into a state of boredom-
Q: Why do they have underground facilities?
A: Because they can.
Disney World has one too. And if I could have (afford) one, I'd have one too because it would make a great place to store my excess 'stuff' and I'd be able to clean out my garage. Hopefully I have cleared that question up for him.