A US think tank said on November 12 it had identified at least 13 of an estimated 20 active, undeclared missile bases inside North Korea, underscoring the challenge for American negotiators hoping to persuade Kim to give up his weapons programs.
He added in his tweet, "I will be the first to let you know if things go bad!"
North Korea declared its nuclear force "complete" and halted missile and nuclear bomb testing earlier this year but US and South Korean negotiators have yet to receive a concrete declaration of the size or scope of the weapons programmes, or a promise to stop deploying its existing arsenal.
Kim said having an undeclared missile base not a "deception" as New York Times called in its article since North Korea has never signed an agreement under which it is mandated to close the base.
Experts said this was very vague, with no detail on how "denuclearization" should happen or what the word even means (the US and North Korea have different ideas).
The report comes as talks between the US and North Korea hit another snag last week, with a NY meeting between Secretary of State Michael Pompeo and the top negotiator from Pyongyang canceled at the last minute.
The "Outnumbered" panel on Tuesday reacted to reports that North Korea is moving ahead with its ballistic missile program at more than a dozen hidden bases.
They are created to enable mobile missile launchers to quickly exit the underground facilities and move to previously prepared launch sites.
But on Thursday, US Ambassador to the United Nations Nikki Haley said North Korea postponed the meeting "because they weren't ready".
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"North Korea has never promised to shut down this missile base", Blue House spokesman Kim Eui-kyeom said.
North Korea also took a step toward denuclearization when officials agreed to allow worldwide inspectors into its nuclear and missile sites - a step North Korea had repeatedly refused to take in the past.
Image: The Sakkanmol missile operating base. That report said that while US intelligence knew about the bases, their existence suggested "a great deception" because the country was improving some sites while offering to dismantle another major launching site. If Kim feels "betrayed" by the release of this report, it could be the sort of excuse he's been wating for to walk away from negotiations with the United States as I've suggested in the past he might do.
Senator Edward Markey, a Massachusetts Democrat who sits on the Foreign Relations Committee, said in a statement that Trump was "getting played by Kim Jong Un".
"The dispersed deployment of these bases and distinctive tactics employed by ballistic missile units are combined with decades of extensive camouflage, concealment and deception practices to maximise the survival of its missile units from pre-emptive strikes and during wartime operations", it said.
The Stimson Center's 38 North group published a commentary Tuesday criticizing what it called a "misleading story" featured the day before in The New York Times.
Less disputable is that North Korea could quickly assault South Korea, including its capital Seoul, and Japan in a crisis.
"The level of effort that North Korea has invested in building these bases and dispersing them is impressive". As of this month, "the base is active and being reasonably well-maintained by North Korean standards" with minor infrastructure changes.