The Pentagon's top military leaders intend to discuss how to best respond to adversaries who purposefully act just below the threshold to provoke U.S. military action, according to Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford. Speaking at a March 29 Center for Strategic and International Studies event, Dunford said combatant commanders would meet on April 6 in a quarterly session, with a full day dedicated to this topic. "The adversary knows exactly what the threshold is for...