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PBS News Hour
What we don’t know in the debate on Russian interference
The CIA has concluded that pre-election Russian hacking was aimed to sway the vote in President-elect Donald Trump's favor. What could we learn from serious investigations? Hari Sreenivasan gets reactions from two men who have extensive experience in intelligence and diplomacy: Michael McFaul, former U.S. ambassador to Russia, and former CIA director James Woolsey.
