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A pro-Russian activist stands with a Russian national flag outside the regional Interior Ministry building in Luhansk, Ukraine, on Wednesday, May 7.
A pro-Russian activist stands with a Russian national flag outside the regional Interior Ministry building in Luhansk, Ukraine, on Wednesday, May 7.

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Rebels: Secession vote to proceed

Pro-Russian separatists defy Putin call to delay referendum in Ukraine. CNN's Nick Paton Walsh reports.

Rebels: Secession vote to proceed

Pro-Russian separatists defy Putin call to delay referendum in Ukraine. CNN's Nick Paton Walsh reports.