The self-proclaimed nuclear power North Korea has reported that it has made further progress in the development of missiles with hypersonic warheads. The missile authority on Tuesday successfully tested “a new-type intermediate-range solid-fueled ballistic missile loaded with newly-developed hypersonic gliding warhead,” North Korean state media said on Wednesday. The test of the Hwasong-16 was led by North Korean ruler Kim Jong Un, KCNA said, adding that the missile travelled 1,000 kilometres before falling into the water in the East Sea, also known as the Sea of Japan, as scheduled. Both Sout…