South Korea's military: North Korea tests medium-range missile. Hypersonic missiles are particularly difficult to intercept because they travel more than five times the speed of sound and are maneuverable.
North Korea is banned from missile launches and tests UN resolutions prohibit North Korea from launching or even testing ballistic missiles, which, depending on their design, can be equipped with a nuclear warhead. The country is subject to international sanctions because of its nuclear weapons and missile programs. The conflict over North Korea's weapons programs has become significantly more explosive again.