World politics -- Security, International 30 National security -- 22 National security 10 Foreign relations -- 8 International relations 7 Military policy 7 more ... Foreign relations 5 Congresses -- 4 Congresses 3 Defenses 3 Globalization 3 Regionalism (International organization) 3 Security, International -- 3 Strategy -- 3 Terrorism 3 Arms control 2 Ballistic missile defenses 2 Deterrence (Strategy) 2 Developing countries -- 2 International cooperation 2 Military history, Modern -- 2 National state 2 Nuclear warfare 2 Peace 2 Political violence 2 Politics and government -- 2 Regionalism 2 September 11 Terrorist Attacks, 2001 2 Southeast Asia -- 2 less ...