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WASHINGTON, DC - DECEMBER 01:  Michael Flynn, former national security advisor to President Donald Trump, leaves following his plea hearing at the Prettyman Federal Courthouse December 1, 2017 in Washington, DC. Special Counsel Robert Mueller charged Flynn with one count of making a false statement to the FBI.  (Chip Somodevilla/Getty Images)
WASHINGTON, DC - DECEMBER 01:  Michael Flynn, former national security advisor to President Donald Trump, leaves following his plea hearing at the Prettyman Federal Courthouse December 1, 2017 in Washington, DC. Special Counsel Robert Mueller charged Flynn with one count of making a false statement to the FBI.  (Chip Somodevilla/Getty Images)

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Whistleblower: Flynn vowed to tear up Russian sanctions

CNN's Manu Raju reports on the latest on the Russia investigation.

Whistleblower: Flynn vowed to tear up Russian sanctions

CNN's Manu Raju reports on the latest on the Russia investigation.