TOKYO -- North Korea's recent escalation of tensions such as missile launches and a potential nuclear test are "serious concerns," a high-ranking U.S. defense official said on Saturday.
Indo-Pacific
North Korea's nuclear push is a 'serious concern': U.S. official
Ely Ratner reiterates commitment to denuclearization of peninsula
Ely Ratner, assistant secretary of defense for Indo-Pacific Security Affairs, speaks at the Mount Fuji Dialogue in Tokyo on Oct. 22. (Photo by Kosuke Imamura)
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