https://motherboard.vice.com/read/this-theory-about-a-russia...
The Vice article is low on actual maps and photos.
Someone posted to HN a link to a similar article with a lot more visual data
http://www.hisutton.com/Yantar.html https://news.ycombinator.com/item?id=12696753
I mean, I think it's extraordinarily difficult, but governments have thrown a ton of money at the problem. :-(