N. Korea nuclear attack would trigger 'overwhelming' response: Mattis
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SEOUL - Any nuclear attack by North Korea on the US or its allies would trigger an "effective and overwhelming" response, US Defense Secretary James Mattis said in Seoul on Friday.
Mattis was in South Korea on his first overseas trip following his appointment, after new President Donald Trump raised concerns in Seoul and Tokyo on the campaign trail with threats to withdraw US forces if the allies did not step up their financial support.
