North Korea Tests Solid-Fuel Missile Engine as Kim Ups Threat to US Mainland

North Korea has tested a new high-thrust solid-fuel rocket engine, which is part of its efforts to develop weapons capable of striking the US mainland. The test was overseen by dictator Kim Jong Un and marks a significant escalation of the country's threat posture. The development comes as tensions between North Korea and the US continue to rise. The successful test could potentially pave the way for North Korea to deploy long-range missiles that can reach the US mainland.