Former CIA officer breaks down 'duty to warn' requirement that saw the US give rival Russia a heads up before the attack in Moscow

Former CIA officer breaks down 'duty to warn' requirement that saw the US give rival Russia a heads up before the attack in Moscow

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The US intelligence community notified Russia of a potential threat head of March 22 Crocus City Hall attack under the "duty to warn" protocol, a requirement that a former CIA case officer broke down in a series of posts this week.

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