Defenses -- 6 Economic aspects 6 Defenses 5 National security -- 4 Military policy 3 Foreign relations -- 2 Prevention -- 2 more ... Terrorism -- 2 Weapons of mass destruction 2 Armed Forces 1 Armed forces 1 Asymmetric warfare -- 1 Civil defense -- 1 Disarmament -- 1 Economic aspects -- 1 Economic convention -- 1 Emergency management -- 1 Government policy -- 1 Military industrial complex -- 1 Nuclear terrorism 1 Nuclear weapons -- 1 World politics -- 1 less ...