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Russian President Vladimir Putin visits a polling station during parliamentary elections in Moscow on September 18, 2016. / AFP / POOL / GRIGORY DUKOR        (Photo credit should read GRIGORY DUKOR/AFP/Getty Images)
Russian President Vladimir Putin visits a polling station during parliamentary elections in Moscow on September 18, 2016. / AFP / POOL / GRIGORY DUKOR        (Photo credit should read GRIGORY DUKOR/AFP/Getty Images)

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    Is hacking group tied to Russian intelligence?

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Is hacking group tied to Russian intelligence?

Experts and intelligence sources say Russia is stepping up its cyberattacks against the US. CNN's Brian Todd reports.

Is hacking group tied to Russian intelligence?

Experts and intelligence sources say Russia is stepping up its cyberattacks against the US. CNN's Brian Todd reports.