South Korea test-fires its first homegrown hypersonic weapon: presidency

South Korean President Lee Jae Myung and other officials observe the Hyunmoo-5 missile at an undisclosed test site in South Korea on Thursday. Seoul - South Korea test-fired its first homegrown hypersonic weapon on Thursday, the presidential office said, days after Pyongyang announced the AI-assisted launch of an intermediate-range hypersonic missile. South Korean President Lee Jae Myung "observed the first test launch of a hypersonic glide vehicle (HGV) -- currently under research and development using domestic technology," the presidential Blue House said in a statement. Hypersonic glide vehicles are sent into the upper atmosphere via rocket boosters or on ballistic missiles, then glide towards their target at five times the speed of sound or greater. Hailing a "key strategic asset capable of changing the course of the battlefield," the South Korean statement said that the missiles' "unpredictable flight trajectories and overwhelming speed enable them to strike key strategic targets." The test was aimed at verifying "the performance of ultra-high-temperature heat-resistant materials -- a core technology for glide vehicles -- as well as guidance and control capabilities and the ability to fly irregularly at low altitudes under hypersonic flight conditions," it added.