This week's Hwasong-18 intercontinental ballistic missile flew twice as high as the previous one and three minutes longer. Experts say that's significant.
The flurry of missile tests shows these claims are not just empty words and reflect actual progress, as Kim is making his arsenal easier to launch and harder to track.
SEOUL (Reuters) - If North Korea follows through on its threat to turn the Pacific Ocean into a "firing range", it would allow the isolated and nuclear-armed state to make technical advances in addition to signalling its military resolve, analysts said.