Another CNN can't confirm BUT……

Washington: United States intelligence officials, citing newly obtained evidence, have concluded that North Korea does not intend to fully surrender its nuclear stockpile, and instead is considering ways to conceal the number of weapons it has and secret production facilities, according to US officials.

https://www.smh.com.au/world/asia/us-intelligence-says-north-korea-plotting-to-keep-nuclear-arsenal-20180701-p4zot5.html