Foreign relations -- 4 Economic conditions 2 Military relations -- 2 Politics and government 2 Politics and government -- 2 Socialism -- 2 Afro-Americans -- 1 more ... Air Forces -- 1 Civil rights 1 Civil rights -- 1 Culture -- 1 Defence 1 Economic conditions -- 1 Embargo -- 1 Foreign relations 1 Gulf war 1 History 1 History -- 1 Labor Day -- 1 May Day (Labor holiday) -- 1 Military service -- 1 Nuclear war 1 Nuclear weapons 1 Political leadership -- 1 Presidential candidates -- 1 Revolution and socialism -- 1 September 11 Terrorist Attacks, 2001 1 Social conditions -- 1 Social indicators -- 1 Social prediction -- 1 less ...