When is a pre-emptive war justified?

When is a pre-emptive war justified? We’ll talk with MICHAEL DOYLE author of Striking First: Preemption and Prevention in International Conflict. Doyle, who lives in Philadelphia, is a professor of International Affairs, Law, and Political Science at Columbia University in New York City. In his new book, he looks the criteria nations have most often used to justify first-strike wars, and how the Bush Doctrine expanded the conditions of when the US could launch a war. Doyle argues that 9/11 was a wake up call for the U.S. but that the Bush Doctrine went too far, and we should rethink when we launch a preemptive war.
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