North Korea has successfully produced a miniaturized nuclear warhead that can fit inside its missiles, crossing a key threshold on the path to becoming a full-fledged nuclear power, U.S. intelligence officials have concluded in a confidential assessment.
北朝鮮は、ミサイルの内部に収まる小型の核弾頭の生産に成功し、本格的な核保有国になるための境界を越えたと、米情報当局者は機密評価で結論付けた。

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