National security -- 18 Foreign relations -- 12 Foreign relations 7 Military policy 7 Relations -- 6 National security 4 Defenses 3 more ... National Security 3 Politics and government -- 3 Government policy -- 2 History -- 2 Military relations -- 2 Nuclear weapons -- 2 Plutonium -- 2 Security, International 2 China 1 Congresses 1 Congresses -- 1 Diplomacy -- 1 Diplomatic relations 1 Economic Diplomacy 1 Economic conditions -- 1 Energy security 1 Foreign policy 1 Human ecology -- 1 Japan 1 Law and legislation -- 1 National security strategy -- 1 Nuclear non-proliferation 1 Nuclear nonproliferation 1 less ...