NATHAN FREIER is a Visiting Professor of Strategy, Policy, and Risk Assessment at the U.S. Army's Peacekeeping and Stability Operations Institute and a Senior Fellow in the International Security Program at the Center for Strategic and International Studies (CSIS). Mr. Freier joined CSIS in April 2008 after retiring from the U.S. Army after 20 years as a lieutenant colonel. His last military assignment was as Director of National Security Affairs at the U.S. Army War College's Strategic Studies Institute. Prior to that, he served in the Office of the Deputy Assistant Secretary of Defense for S...