World politics -- 21st century World politics -- 20th century 9 National security -- United States 7 Security, International 7 United States -- Military policy 5 National security 4 Balance of power 3 more ... International relations 3 United States -- Foreign relations 3 United States -- Foreign relations -- 2001-2009 3 United States -- Foreign relations -- 21st century 3 War on Terrorism, 2001-2009 3 Air power -- United States 2 Ballistic missile defenses 2 Freedom of information 2 Globalization 2 Islamic fundamentalism 2 Just war doctrine 2 Military policy 2 North Atlantic Treaty Organization -- Military policy 2 Politics and war 2 Power (Social sciences) -- United States 2 Social movements 2 Strategy 2 United States -- Economic conditions 2 United States -- Politics and government -- 2009- 2 United States. -- Air Force 2 War 2 Anti-globalization movement 1 Arab-Israeli conflict -- 1993- 1 less ...