Solid-fuel ICBM? What we know about Kim Jong Un's arsenal
North Korea said Thursday it had test-fired one of its newest and most powerful weapons to boost its nuclear deterrent, with Seoul warning it could be a solid-fuel intercontinental ballistic missile. AFP takes a look at what we know: What is a solid-fuel missile? Solid-fuel missiles are powered by a chemical mixture which is cast into the missile's airframe when it is built - like a