Government policy -- Terrorism -- 17 Foreign relations -- 9 Politics and government -- 7 Prevention -- 7 History -- 5 Nuclear weapons -- 5 more ... War on terrorism, 2001- 5 Case studies 4 Congresses -- 4 Economic policy 4 National security -- 4 Petroleum industry and trade -- 4 Congresses 3 Economic conditions 3 Economic conditions -- 3 Foreign economic relations -- 3 Foreign relations 3 Government policy 3 Industrial policy -- 3 International cooperation 3 Produce trade -- 3 Refugees -- 3 Arms transfers -- 2 Case studies -- 2 Economic aspects -- 2 Economic policy -- 2 Emigration and immigration -- 2 Environmental aspects -- 2 Environmental policy -- 2 less ...