the problems posed by North Korea

It is safe to say that North Korea is an intransigent rogoue state. Right now it is accelerating its nuclear and ballistic missile capabilities with the specific purpose of hurting the United States and its allies in the East Asia region. Once more North Korea is also exporting dangerous material to other nations with hostile intentions such as Iran and Syria. This poses a rather unique challenge to the United States in the Pacfic Rim. I was aware of that as well.