US President-elect Donald Trump has criticised outgoing CIA Director John Brennan after Mr Brennan told Fox News Mr Trump doesn't have a "full understanding" of Russia's threat to the world.
Donald Trump responded with a Tweet criticising the CIA's record under Mr Brennan, and questioned whether the director had leaked an unverified dossier alleging Russia could have compromising material on Mr Trump.
Harry Horton reports from Washington.
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