Defenses 11 Defenses -- 9 Economic aspects 8 National security -- 8 Military policy 4 Civil defense -- 3 Politics and government -- 3 more ... Terrorism -- 3 Armed Forces 2 Armed forces 2 Emergency management -- 2 Foreign relations -- 2 Prevention -- 2 Weapons of mass destruction 2 Addresses, essays, lectures 1 Appropriations and expenditures 1 Arms race 1 Asymmetric warfare -- 1 Civil defense 1 Disarmament 1 Disarmament -- 1 Disaster relief -- 1 Economic aspects -- 1 Economic convention -- 1 Government policy -- 1 Harbors -- 1 Insurgency 1 Merchant marine -- 1 Military industrial complex -- 1 Military weapons 1 less ...