Detailed text transcripts for TV channel - CNN - 20170828:09:55:00
Ripley who is in pyongyang, the only western television correspondent in north korea since this latest escalation. tell us more about that, will. >> reporter: the last couple of hours, south korea's national intelligence service saying they have detected activity at the underground tunnels that north korea uses to conduct these nuclear tests. we find out about the nuclear tests when an earthquake is detected. that's how powerful they are. while they believe a test could happen at any moment with little or no notice, this is something we've been hearing for months now. you'll remember in april ...
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