Government policy -- Terrorism -- 17 Foreign relations -- 8 Prevention -- 7 Politics and government -- 6 History -- 5 War on terrorism, 2001- 5 more ... Case studies 4 Congresses -- 4 National security -- 4 Petroleum industry and trade -- 4 Refugees -- 4 Congresses 3 Economic conditions 3 Economic conditions -- 3 Economic policy 3 Foreign economic relations -- 3 Government policy 3 Human rights -- 3 International cooperation 3 Nuclear weapons -- 3 Politics and government 3 Produce trade -- 3 Case studies -- 2 Economic policy -- 2 Emigration and immigration -- 2 Environmental aspects -- 2 Environmental policy -- 2 Foreign relations 2 Grain trade -- 2 less ...