Compare this and this. Note: both maps contain kind of "black hole" in the middle of the town. Sure: it's some kind of top-sikrit object. I'm pretty sure appropriate Google search reveal which object exactly - but it does not mean you'll not be jailed for possesion of map of that object.
It does not work as military precaution but it works very well indeded if you want to punish someone :-)
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds