Tensions have heated up in recent months over the north's continued development of its nuclear and missile programme, in spite of global condemnation and worldwide sanctions.
Last week, North Korea shattered 2½ months of relative quiet by firing off an intercontinental ballistic missile that some observers say showed the reclusive country's ability to strike the U.S. East Coast.
It was the country's third intercontinental ballistic missile (ICBM) test, but the first of what North Korea is calling its Hwasong-15 missile. "We sternly warned that the North has all responsibility for inter-Korean tensions and a threat to the world peace", the resolution read.
"The U.S. and South Korean puppet warmongers would be well advised to bear in mind that their DPRK-targeted military drill will be as foolish as an act precipitating their self-destruction", it said.
He pointed to China's "coercive economic power" over North Korea as a nonviolent solution, specifically in regard to fuel, because "you can't shoot a missile without fuel".
"North Korea is continuing to pursue its ICBM in a methodical and pragmatic manner, making progress in incremental steps", said Joseph Bermudez from 38 North, a Washington-based North Korea monitoring project. North Korea's latest missile is believed by experts to be capable of reaching all parts of the continental U.S. Despite its range, though, reports say U.S. officials now believe the missile likely did not survive re-entry into the Earth's atmosphere.
"Our initial analysis of the photos showed that there were clear differences between the Hwasong-15 and Hwasong-14 in terms of the looks of the warhead, the joint of the first and second stages of the missile, and overall size", Roh told a briefing on Thursday.
He pushed China to do more, including cutting off North Korean oil imports. Every missile test, every underground test of a nuclear weapon, means the marriage is more likely.
McMaster said the possibility of war with the North was "increasing every day". "However, the quake could have been caused by geological changes created from the recent nuclear explosion", said an agency official who asked not to be named.