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[email protected] APPROVED FOR DISTRIBUTION: Sherri Goodman Executive Director, Military Advisory Board General Counsel, The CNA Corporation This document represents the best opinion of The CNA Corporation at the time of issue. Copyright 2007 The CNA Corporation To the reader, MILITARY ADVISORY BOARD During our decades of experience in the U.S. military, we have addressed many national security challenges, from containment and deterrence of the Soviet General Gordon R. Sullivan, USA (Ret.) Chairman, Military Advisory Board nuclear threat during the Cold War to terrorism and extremism in recent years. Global climate change presents a new and very different type of national Admiral Frank “Skip” Bowman, USN (Ret.) security challenge. Lieutenant General Lawrence P. Farrell Jr., USAF (Ret.) Over many months and meetings, we met with some of the world’s leading climate scientists, business leaders, and others studying climate change. We Vice Admiral Paul G. Gaffney II, USN (Ret.) viewed their work through the lens of our military experience as warfighters, General Paul J. Kern, USA (Ret.) planners, and leaders. Our discussions have been lively, informative, and very sobering. Admiral T. Joseph Lopez, USN (Ret.) Carbon dioxide levels in the atmosphere are greater now than at any time in Admiral Donald L.