North Korea’s lofted test launch of a Hwasong-15 intercontinental ballistic missile (ICBM) over the weekend has revived debate about the viability of the country’s reentry vehicle (RV) designs. 

For years, outside experts have looked for comfort in the possibility that, despite Pyongyang’s substantial advances in missile booster technologies, it has yet to master the art of bringing down what it sends up.

Indeed, reporters grilled a South Korean Joint Chiefs of Staff (JCS) official about the matter at a defense ministry briefing, and he dodged questions about whether North Korea’s RV