The Beyond Parallel program at the Center for Strategic and International Studies identified the bases in a Monday report, signaling that Pyongyang has been misleading the West about its intentions to dismantle its missile program, according to The New York Times. Many people also believe that they have no intention of stopping that development under any circumstances, but still hoping that global pressure will force the Trump administration to left sanctions.
While missiles could be launched from the bases in an emergency, they are not intended as launch sites.
The bases, which are scattered across the country, are located in underground facilities tunneled in narrow mountain valleys, according to the researchers. "As of November 2018, the base is active and being reasonably well-maintained by North Korean standards", the report noted.
With the prolonged stalemate in denuclearisation negotiations between the United States and North Korea, it appears to be hard for Kim to visit Seoul and inter-Korean projects to further move ahead this year.
That is the North's Achilles heel as Kim turns his attention from developing its nuclear weapons arsenal to building its economy.
After a tense 2017, diplomacy produced a thaw at the start of this year.
US President Donald Trump has been trying to deescalate conflict on the Korean peninsula. In public, he has largely kept this positive view of negotiations. "But we are very happy how it is going with North Korea", Trump said. "The deployment pattern has evolved over time, garnering a variety of descriptions, but today it is most commonly described as consisting of the three "belts": the Tactical (or Forward), the Operational, and the Strategic (or Strategic Rear) based upon their physical distance from the DMZ [Demilitarized Zone]".
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The revelations, like earlier reports on the continuation of North Korea's weapons programs, highlight the challenges of securing the complete denuclearization of the Korean Peninsula.
Duyeon Kim, an adjunct senior fellow at the Centre for a New American Security, said while these developments violate UN Security Council resolutions, they do not breach Kim's agreement with Trump.
North Korea declared its nuclear force "complete" and halted missile and nuclear bomb testing earlier this year, but USA and South Korean negotiators have yet to elicit from Pyongyang a concrete declaration of the size or scope of the weapons programmes, or a promise to stop deploying its existing arsenal.
Trump played down the delay in Pompeo's meeting with Kim Yong Chol, a right-hand man of North Korea's leader, and said it was a scheduling issue.
"What North Korea has offered is the beginning of a process that might - might - someday lead to an outcome like that".
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This comes after North Korea canceled a meeting with Secretary of State Mike Pompeo last week, with outgoing United Nations Ambassador Nikki Haley explaining the north was "not prepared" for the talks.