North Korea's nuclear capability is the country's most closely guarded secret.
Consequently, there's a lot we don't know. It's unclear if leader Kim Jong-un's missiles could survive re-entering the Earth's atmosphere. It's also uncertain if the North can develop a nuclear warhead small enough for its missiles and how such a warhead would affect the missiles' trajectory.
But here's what we do know about the intercontinental ballistic missile that's made headlines recently: the Hwasong-14.
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