Russia/China are clearly the only reason we didn't invade a long time ago. You should have listened to General Mac Harry!!
I mean look at this potential treasure trove:
In fact, North Korea is sitting on the goldmine. The northern side of the Korean peninsula is well known for its rocky terrain with 85% of the country composed of mountains. It hosts sizeable deposits of more than 200 different minerals, of which deposits of coal, iron ore, magnesite, gold ore, zinc ore, copper ore, limestone, molybdenum, and graphite are the largest and have the potential for the development of large-scale mines. After China, North Korea's magnesite reserves are the second largest in the world, and its tungsten deposits are almost the sixth-largest in the world. Still the value of all these resources pales in comparison to prospects which promise the exploration and export of rare earth metals.
Rare earth metals are a group of 17 elements which are found in the earth's crust. They are essential in the manufacture of high-tech products and in green technologies, such as wind turbines, solar panels or hybrid cars. Known as "the vitamins of high-tech industries," REMs are minerals necessary for making everything that we use on a daily basis, like smartphones, LCDs, and notebook computers. Some Rare earth metals, such as cerium and neodymium, are crucial elements in semiconductors, cars, computers and other advanced technological areas. Other types of REMs can be used to build tanks and airplanes, missiles and lasers.
South Korea estimates the total value of the North's mineral deposits at more than $6 trillion USD. Not surprisingly, despite high political and security tensions Seoul is showing a growing interest in developing REMs together with Pyongyang. In 2011, after receiving permission from the Ministry of Unification, officials from the Korea Resources Corp visited North Korea twice to study the condition of a graphite mine. Together with their counterparts from the DPRK's National Economic Cooperation Federation they had working-level talks at the Kaesong Industrial Complex on jointly digging up REMs in North Korea. An analysis of samples obtained in North Korea showed that the type of rare earth metals could be useful for manufacturing LCD panels and optical lenses. Montreal Review August 2012