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SEOUL, South Korea — 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 ...

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 ...

SEOUL, South Korea — North Korean leader Kim Jong Un observed a test of a high-thrust, solid-fuel engine test and hailed it as a development to boost the country's strategic military capability, state ...