There is absolutely no proof that North Korea would use a nuclear weapon none!!! In fact maybe America should move to sign a peace treaty to end the War that they started, or remove their 30 000 soldiers from the border. Well the UN called on Israel to halt their uranium enrichment program, but with American support told them where to go. North Korea seem firmly committed to the policy of brinkmanship, if they are to conduct further nuclear tests/rocket launches this year. They want recognition for being a nuclear power diplomatic approval from America, they will be willingly to return to talks about non-proliferation while getting a ton of financial/food aid. It's makes sense they are using what is there most valuable asset, in order to gain aid/concessions.