The situation can be solved very easily, just not by us. If China and Iran were to join the civilized world in regards to sanctions, the problem would resolve itself rather quickly. The North Korean problem is only a problem because these two other countries allow it to continue.
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Were we brainwashed by the Geneva conventions? Clearly, you have no idea what goes on in that country. Speakers in your house for the dictator to preach at you. Any disagreement with government results in being taken away to be worked to death at a "re-education camp", if you are not just shot on site. An entire population is being starved so a tiny country can have a nuclear program they cannot afford, and it still is so underfunded, it will take millions more starved to get it even remotely viable. Yeah, sure. We are the ones who are brain washed....