North Korea’s Kim Jong-un wants payback from Vladimir Putin for his troops’ sacrifices in Russia’s war against Ukraine — something Moscow is moving belatedly to address, a leading expert said Tuesday.

Kim Yo Jong, Vice Department Director of the Central Committee of the Workers’ Party of Korea, has dismissed the demand for denuclearization of the Democratic People’s Republic of Korea, calling it “a daydream.

North Korea’s indigenous technological base is clearly insufficient to have developed the submarine on its own—almost certainly meaning that Pyongyang sought help from Russia.