North Korea has test-fired a tactical ballistic missile equipped with a "new autonomous navigation system," state media said Saturday, with leader Kim Jong Un vowing to boost the country's nuclear force.
Kim oversaw the Friday test-launch into the Sea of Japan on a mission to evaluate the "accuracy and reliability of the autonomous navigation system," the North's official Korean Central News Agency (KCNA) said.
The launch was the latest in a string of ever more sophisticated tests by North Korea, which has fired off cruise missiles, tactical rockets and hypersonic weapons in recent months, in what the nuclear-armed, U.N.-sanctioned country says is a drive to upgrade its defenses.
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