But besides the issue of North Korea, the SDD touched upon many other subjects, from maritime disputes to cyber-security and terrorism.
Tensions are running high near a former golf course in Seongju, South Korea, as news reached anti-THAAD activists that four additional launchers of the US missile defense system are to be deployed early Thursday.
North Korea has completed development of a solid-fuel intercontinental ballistic missile and displayed its capability to develop a nuclear-tipped ICBM in its nuclear test on Sunday, a USA intelligence officer claimed Thursday.
The last nuclear test North Korea conducted was September 9, 2016 - Foundation Day a year ago. Seongju residents and activists have anxious over rumoured health hazards and the possibility of being targeted in North Korean attacks. The North says it detonated a hydrogen bomb in its sixth nuclear test on Sunday.
Sixty-five percent of the surveyed said South Korea should suspend all support toward North Korea if Pyongyang fails to abandon its nuclear ambitions. Figures also spiked in 2007 after North Korea's first nuclear test.
Concerns have risen that the North could carry out additional provocations to mark the anniversary as the regime has often timed major provocations with important anniversaries, including the founding anniversary, one of the most celebrated holidays.
South Korea and the United States are technically still at war with North Korea after the 1950-53 Korean conflict ended with a truce, not a peace treaty.
Dozens of protesters injured in clashes with police on Wednesday as hundreds took to the streets to oppose the installation of the THAAD system, fearing the deployment will further escalate the crisis on the peninsula and make their town a primary target for the North's potential attacks. "It doesn't seem much time is left before North Korea achieves its complete nuclear armament", the prime minister told a meeting of defense ministers in Seoul Thursday.
The launchers were transported by U.S. Forces Korea vehicles to Seongju County under the cover of darkness early morning Thursday.
"North Korea could be playing with us, looking like they're moving stuff around just to keep people on edge", Delury said.
"We can solve this problem through diplomatic means".
In Seoul, life is carrying on as normal.
Kim Jong-un during a visit to the Chemical Material Institute of the Academy of Defence Science.
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