<p>On <strong>6 April 2026</strong>, South Korean lawmakers reported that North Korea conducted a test of a new <span class="key-term" data-definition="Solid‑fuel rocket engine — a missile propulsion system that uses solid propellant, enabling quicker launch and simpler logistics; crucial for strategic missile development (GS3: Defence & Security).">solid-fuel rocket engine</span>. The engine is intended for a next‑generation <span class="key-term" data-definition="Intercontinental ballistic missile (ICBM) — a long‑range ballistic missile capable of delivering nuclear or conventional warheads over distances exceeding 5,500 km, a core element of strategic deterrence (GS3: Defence & Security).">ICBM</span> built with <span class="key-term" data-definition="Carbon fibre — a lightweight, high‑strength composite material used to reduce missile weight and increase payload capacity, facilitating multiple warheads (GS3: Defence & Security).">carbon fibre</span> airframes, allowing greater thrust and the possibility of multiple warheads.</p> <h3>Key Developments</h3> <ul> <li>March 2026: Ground test of the new solid‑fuel engine, believed to be for the latest ICBM.</li> <li>Engine reportedly delivers higher thrust than the 2024 model, which could already strike any point in the mainland United States.</li> <li>North Korean media displayed the carbon‑fibre missile airframe alongside the engine test.</li> <li>Leader <strong>Kim Jong Un</strong> attended the March 28 test, calling it a "significant upgrade" to strategic forces.</li> <li>All longer‑range launches have been on a <span class="key-term" data-definition="Lofted trajectory — a missile flight path with a high apogee and short down‑range distance, used to test performance while limiting over‑flight of other territories (GS3: Defence & Security).">lofted trajectory</span>, landing in the East Sea or east of Japan.</li> </ul> <h3>Important Facts</h3> <ul> <li>North Korea continues to violate the <span class="key-term" data-definition="United Nations Security Council (UNSC) ban — a resolution prohibiting member states from conducting missile and nuclear tests, aimed at curbing proliferation (GS1: International Relations).">UNSC ban</span> on missile and nuclear tests.</li> <li>The test was briefed to South Korean reporters by the <span class="key-term" data-definition="National Intelligence Service (NIS) — South Korea's primary intelligence agency responsible for national security and foreign intelligence (GS2: Polity).">National Intelligence Service</span>.</li> <li>Use of carbon‑fibre reduces missile weight, potentially increasing range and enabling carriage of multiple warheads.</li> </ul> <h3>UPSC Relevance</h3> <p>The development touches upon several GS topics: <strong>GS3 – Defence & Security</strong> (missile technology, strategic deterrence, proliferation norms), <strong>GS1 – International Relations</strong> (UN sanctions regime, regional security dynamics), and <strong>GS2 – Po