The FUSA, NATO, and the UN keep jerking NK's chain with both economic and military sanctions and world media promoted "insults"... An egotistical Kim IL is known to regard "Face saving" as being the extreme psychological motivator among Asians... Not a good situation.
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SEOUL, South Korea – North Korea on Monday issued its latest belligerent threat, warning of an indiscriminate "pre-emptive nuclear strike of justice" on Washington and Seoul, this time in reaction to the start of huge U.S.-South Korean military drills.

Such threats have been a staple of young North Korean leader Kim Jong Un since he took power after his dictator father's death in December 2011. But they spike especially when Washington and Seoul stage what they call annual defensive springtime war games. Pyongyang says the drills, which were set to start Monday and run through the end of April, are invasion rehearsals.

The North's powerful National Defense Commission threatened strikes against targets in the South, U.S. bases in the Pacific and the U.S. mainland, saying its enemies "are working with bloodshot eyes to infringe upon the dignity, sovereignty and vital rights" of North Korea.

"If we push the buttons to annihilate the enemies even right now, all bases of provocations will be reduced to seas in flames and ashes in a moment," the North's statement said.

more plus video: http://www.foxnews.com/world/2016/03/07/north-korea-again-threatens-to-strike-us-south-korea-with-nukes.html