National security -- 8 Terrorism -- 5 International relations 4 National security 4 Foreign relations 3 United States 3 Foreign relations -- 2 more ... Prevention 2 Security Management 2 Security council 2 War on terrorism, 2001- 2 Weapons of mass destruction 2 Constructivism (Philosophy) 1 Economic development 1 Homeland security 1 Infrastructure -- 1 International offenses 1 Iraq War, 2003 1 Islam 1 Legitimacy of governments -- 1 Military policy 1 Political elites -- 1 Political stability 1 Politics & government -- 1 Politics and government 1 Reconstruction 1 Role -- 1 Safety measures 1 Security Council 1 Security measures 1 less ...