The Democratic People's Republic of Korea (DPRK) remains one of the United States' most critical security challenges in Northeast Asia. North Korea remains a security threat because of its willingness to undertake provocative and destabilizing behavior, including attacks on the Republic of Korea (ROK), its pursuit of nuclear weapons and long-range ballistic missiles, and its willingness to proliferate weapons in contravention of its international agreements and United Nations Security Council Resolutions. North Korean aspiration for reunification - attainable in its mind in part by expelling...