[threeseed]

There are plenty of tours that operate in North Korea.

Koryo Tours is one that I took a few years ago.

[w8rbt]

Also, the government occasionally allows a radio amateur to operate. Just this month, North Korea was active on HF (last time was 2002). They'll be active again in Feb 2016:

http://www.arrl.org/news/p5-3z9dx-concludes-demonstration-op...

http://www.eham.net/articles/35853