Primary Outlet: Public SquareBroadcast Date: Tuesday, September 20, 2011 - 2:35pmBroadcast Type: interviewBroadcast Format: radioScholar: Preble, Christopher A.Subjects: the role of the U.S. militaryResearch Area: Foreign Policy and National SecurityLink: http://www.cato.org/multimedia/radio-highlights/christopher-preble-debates-role-…