In his first major public address since becoming CIA director last month, William Burns warned that Russian President Vladimir Putin’s “risk appetite has grown” in recent years.
In Thursday's wide-ranging speech, he also warned that a “pugnacious and revisionist Russia” could become increasingly desperate as its invasion of Ukraine drags on.
Burns said that the potential Russian use of low-yield nuclear weapons to offset setbacks in Ukraine cannot be “taken lightly”, although there is little practical evidence to reinforce such a concern.
The CIA director went on to praise the accuracy of US intelligence in Ukraine, which he said was critical in solidifying the Western alliance and rallying global support.
He added that democracies can use information-gathering “openly and creatively ” to discredit the false narratives of adversaries.