CNN 10 - February 7, 2018 | Norovirus strikes Olympic security officers ...

source: NEWS with Subtitles     2018年2月6日
An outbreak of norovirus forces some changes to security ahead of the 2018 Winter Olympics. Wild swings in the U.S. stock market get investors' attention worldwide. The world's most powerful rocket lifts off. Lasers help researchers discover thousands of Mayan structures in Guatemala.
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