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SEOUL, South Korea (AP) — North Korean leader Kim Jong Un observed a test of an upgraded solid-fuel engine for weapons capable of reaching the U.S. mainland, and called it a significant development ...

Solid-fuel technology seen as harder to detect and deploy North Korean leader Kim Jong Un inspecting a combustion test of a solid-fuel rocket engine at an undisclosed location in North Korea. KCNA/AFP ...

Add Yahoo as a preferred source to see more of our stories on Google. SEOUL, South Korea — North Korean leader Kim Jong Un observed a test of an upgraded solid-fuel engine for weapons capable of ...

Kim Jong Un observed a test of a high-thrust, solid-fuel engine for weapons, hailing it as a development to boost North Korea's strategic military capability, state media reported. The test likely ...