References
NATO 2020: Assured Security; Dynamic Engagement: Analysis and Recommendations of the Group of Experts on a New Strategic Concept for NATO(link is external). Brussels: NATO, 2010.
Helping Others Defend Themselves: The Future of U.S. Security Assistance(link is external)." Foreign Affairs (2010). "
Opening NATO’s Door(link is external). New York: Columbia University Press, 2002.
The Revenge of Geography(link is external)." Foreign Policy (2009): 96-105. "
U.S. Department of Defense Quadrennial Defense Review(link is external). Washington, D.C.: U.S. Department of Defense, 2010.
Testimony to the U.S. Senate Appropriations Committee(link is external). Washington, D.C., 2009.