Pakistan, June 4 -- North Korean leader Kim Jong Un has said the country's capacity to produce weapons-grade nuclear material has more than doubled over the past five years, signaling Pyongyang's continued commitment to expanding its nuclear arsenal.

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According to the state-run Korean Central News (KCNA), Kim made the remarks during a visit to a newly inaugurated nuclear materials production facility on Wednesday. The visit highlighted North Korea's efforts to strengthen its nuclear capabilities amid what it describes as growing security threats.

Kim said the country faces a prolonged confrontation with its "most ferocious enemies" and must respond to existing and potential threats...