This is the video that made notables. If you haven't watched it please do. Think closely about what he is saying. Where would you put an entrance to a highly valuable tunnel? What type of guard would be scarier than a pit bull with aids? Imagine having a tunnel to your bunker and it was known to be a nuclear waste dumping ground. Would any fool bother to check inside? Hell NO.
Find where they dump their nuclear waste and we have found their front door!