People lie, satellite images don't-hence why the US and South Korea are closely monitoring a new suspected missile site near North Korea's central border with China.
There was no immediate reaction from the Trump administration Thursday to the reports that raised concern in national security circles about the pace of denuclearization talks between Washington and Pyongyang.
New satellite images have revealed that North Korea has significantly expanded a key long-range missile base located in a remote mountainous area, despite ongoing talks this year with the USA over the country's nuclear disarmament.
North Korea had announced the testing of an unspecified "newly developed ultramodern weapon" amid reports that it was continuing to develop its nuclear and missiles programs.
In their new report, Lewis and Schmerler said that while closing the test stand would make it harder for the North to design new kinds of missiles, "it would not prevent North Korea from continuing to mass produce and deploy existing types of nuclear-armed missiles that can strike the United States".
"They have not lived up to the commitments so far", Bolton said at The Wall Street Journal's annual CEO Council conference in Washington.
Despite the initial optimism generated by Kim and Trump's June summit meeting in Singapore, little has transpired since then.
Researchers were able to locate five entrances to underground tunnels they said may be used to store missiles.
In his meeting with Trump, Kim made a vague pledge to "work toward the complete denuclearization of the Korean Peninsula" in return for "new" relations and security guarantees from Washington. North Korea is now seeking security guarantees from the US and relief from the global sanctions. After a series of dubious talks, Trump claimed that he and Kim "fell in love" and that denuclearization of the Korean Peninsula would come "very, very quickly".
Last month, Vice President Mike Pence told NBC News that the U.S. will not require North Korea to provide a full list of its nuclear and missile sites before Trump meets again with Kim. -North Korea negotiations to dismantle Pyongyang's nuclear weapons program. A headquarters area is positioned at the mouth of the valley, the images show. "These shelters are similar to the ones seen at the older portion of the Yeongjeo-dong base".