Koryo group. The one thing that has stopped me from doing so is the thought that foeign visitors may be used in North Korean propaganda as evidence of foreign support for the regime of the Kims, as well as the potential use of foreign currency earned from tourists in the Kim's various terrorism and drug-dealling enterprises.
A partial confirmation of this idea came in North Korean defector Park Yeon-Mi's live Q&A today in answer to a question about what the ordinary people of North Korea think about the outside world:
Am I wrong about this? At least it seems I am not the only one who thinks so.
[Photo: Tourists chat with local North Koreans. By Norman Harak, via Wiki]