Managing Editor Jonathan Tepperman moderated a debate between two recent authors, Colin Kahl and Matthew Kroenig. As the Iranian nuclear program progresses, the options for U.S. foreign policy include diplomacy, acquiescing to a nuclear-armed Iran, and military action. Is a strike the least bad option, if sanctions, engagement, and diplomacy have proved ineffectual? Would a strike indicate an offensive campaign by the United States and escalate quickly and unnecessarily?

Watch the expert panelists discuss the assumptions involved in decisionmaking--whether Iran is a rational state, what the real timing is for nuclear processes, and how the region will react.

Read the speakers' articles and more at http://www.ForeignAffairs.com