Korean Explosion Worries U.S. U.S. officials closely monitor what they call worrisome new data on North Korea's nuclear activities after a large unexplained explosion was reported over North Korea Thursday. Experts seek to determine whether North Korea is preparing to test a nuclear weapon. NPR's Vicky O'Hara reports.
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U.S. Worried by Possible Korean Nuclear Test

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U.S. Worried by Possible Korean Nuclear Test

U.S. Worried by Possible Korean Nuclear Test

U.S. Worried by Possible Korean Nuclear Test

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  • <iframe src="https://www.npr.org/player/embed/3914698/3914699" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

U.S. officials closely monitor what they call worrisome new data on North Korea's nuclear activities after a large unexplained explosion was reported over North Korea Thursday. Experts seek to determine whether North Korea is preparing to test a nuclear weapon. NPR's Vicky O'Hara reports.