Israel's assassination of high-ranking military and political figures in Iran is raising questions about the regime's ability to survive this war, especially if the US enters the fight.
But the regime won't be easy to topple, despite its isolation, because of the enduring grip on power of military ideologists and the lack of a domestic opposition.
So how might this war end?
Guest: Dr. Afshon Ostovar, author of Wars of Ambition: The United States, Iran, and the Struggle for the Middle East, associate professor at the US Naval Postgraduate School.
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Global Roaming with Geraldine Doogue and Hamish Macdonald