Interesting article. I've stood on the China side of a river between China and North Korea, more like a stream really, where I could almost throw a rock into North Korea. Still haven't worked up the courage to actually enter, though I understand if you don't do anything stupid it's pretty much safe to visit. This was up in Jilin Province, China, where Russia, China, and North Korea meet. I've been there a few times and must admit it still feels a bit surreal every time I'm there. I cant avoid recalling as a child during the Reagan era and "Red Dawn", I'd really considered that this place must be hell-on-earth, a communist axis-of-evil. But, it's a pretty cool place to visit.