Obama's Calculus in Syria

Fred Kaplan, War Stories columnist for Slate and author of The Insurgents: David Petraeus and the Plot to Change the American Way of War, wrote last week: "One thing that [President] Obama has made very clear in his approach to war and peace: He abhors the prospect of uncontrolled escalation." Today, he talks about the Obama administration's "red line" when it comes to Syria, and the calculation of conflict.