Obama's Calculus in Syria

U.S. President Barack Obama speaks to the media after meeting with Congressional leaders at the White House, March 1, 2013.

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.