Defenses 16 Defenses -- 12 Economic aspects 10 National security -- 10 Military policy 6 Civil defense -- 4 Politics and government -- 4 more ... Armed Forces 3 Terrorism -- 3 World politics -- 3 Appropriations and expenditures 2 Armed Forces -- 2 Armed forces 2 Economic aspects -- 2 Emergency management -- 2 Foreign relations -- 2 Military relations -- 2 Prevention -- 2 War on Terrorism, 2001-2009 2 Weapons of mass destruction 2 Addresses, essays, lectures 1 Armed forces -- 1 Arms control -- 1 Arms race 1 Asymmetric warfare -- 1 Civil defense 1 Congresses 1 Congresses -- 1 Defense contracts -- 1 Disarmament 1 less ...