“We have been in a clandestine war for 40 years”: Former Trump NSC senior director on the past, present and future of conflict with Iran

International Spy Museum executive director Chris Costa, who served as the senior director for counterterrorism on the National Security Council during President Trump’s first year in office, joins Yahoo News Editor in Chief Daniel Klaidman and Chief Investigative Correspondent Michael Isikoff to discuss the origins of the 40-year conflict between the United States and Iran — and what might be next.