National security -- Foreign relations -- 28 Terrorism -- 20 Military policy 18 World politics -- 14 Government policy -- 10 Foreign relations 9 more ... Prevention. -- 9 Military relations -- 8 Prevention -- 8 Defenses 7 History -- 7 National security 7 Politics and government -- 7 Security, International 6 War on Terrorism, 2001-2009 6 Civil defense -- 5 Decision making 5 Relations -- 5 Civil rights -- 4 Decision making -- 4 Defenses -- 4 Intelligence service -- 4 Economic aspects 3 Law and legislation -- 3 Armed Forces -- 2 Armed forces 2 Congresses 2 Congresses -- 2 Economic aspects -- 2 less ...