The hidden world in short-wave.
I was interviewed a few weeks back for my website priyom.org [soylentnews.org] which is a community tracking and logging Number Station and military radio stations all over the world.
The article on the Daily Beast can be found here: http://www.thedailybeast.com/articles/2016/03/06/the-stupidly-simple-spy-messages-no-computer-could-decode.html [thedailybeast.com]
It's well written and a good introduction into the world of number stations and short-wave and I think the Soylent community will enjoy the article, maybe prompt some of you to dig a radio out of your attic and have a listen.
Some other resources to check out on the scene:
Enigma 2000 group http://www.brogers.dsl.pipex.com/enigma2000 [pipex.com]
Simon Mason's website http://www.simonmason.karoo.net/ [karoo.net]