I just got my General license and no HF radio yet, so no practical experience with HF/DXing.
I've been wondering, are there amateur contacts to be made in places like North Korea and Cuba? I would imagine that even if people there could scare-up the hardware, the govt. would frown-on their radio activity (that of course could be an understatement).
Or what about amateur radio contacts in the USSR before say 1990?
What about amateur radio contacts in some of the more repressive countries in Africa?