National security 68 Military policy 20 Foreign relations 9 Politics and government 8 World politics 6 Armed Forces 4 Congresses 4 Defenses 4 History 4 Economic aspects 3 Economic policy 3 Energy policy 3 Government policy 3 Intelligence service 3 Law and legislation 3 Military relations 3 Security, International 3 Attorneys general 2 Civil rights 2 Economic conditions 2 Economic integration 2 Landlord and tenant 2 Pacific Area cooperation 2 Petroleum industry and trade 2 Police 2 Sources 2 Strategic materials 2 Strategy 2 Voting 2 Appropriations and expenditures 1