According to a report by Stockholm International Peace Research Institute (SIPRI), the combined military stockpile of the world's nine nuclear-armed states rose from 9,380 to 9,620 in one year, excluding the warheads waiting to be dismantled.
North Korean leader Kim Jong-un said during his summit with South Korean President Moon Jae-in that he would close the country's nuclear test site in full view of outside world, Moon's office says.
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