 After Jong-un's declaration, the Pentagon called for an advanced missile defense system to the western Pacific on April 3.United States Secretary of Defense, Chuck Hagel, said that North Korea posed "a real and clear danger" to not only the United States, but Japan and South Korea as well.The deployment of the battery to the US territory of Guam is the biggest demonstration yet that Washington regards the confrontation with North Korea as more worrying than similar crises of the past few years.