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As Russia celebrates the start of the school year and the Day of Knowledge, Vladimir Putin held the national open lesson in Yaroslavi.
As Russia celebrates the start of the school year and the Day of Knowledge, Vladimir Putin held the national open lesson in Yaroslavi.

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    Russia reacts to North Korea's nuclear test

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Russia reacts to North Korea's nuclear test

While Russia is critical of North Korea's nuclear ambitions, it is taking aim at the US for what it says is a failed policy. CNN's Frederik Pleitgen reports.

Russia reacts to North Korea's nuclear test

While Russia is critical of North Korea's nuclear ambitions, it is taking aim at the US for what it says is a failed policy. CNN's Frederik Pleitgen reports.