Dan encouraged me to mention a new book that some Duck readers might find interesting, Hitting First: Preventive Force in U.S. Security Strategy (University of Pittsburgh Press, 2006), edited by William W. Keller and Gordon R. Mitchell of Pitt's Matthew Ridgway Center for International Security Studies. Their chapter 1, "Preemption, Prevention, Prevarication" is available on the press website.Disclosure: the volume includes my chapter,...