Diplomatic relations 33 Foreign relations 33 History 25 Government policy 19 Law and legislation 18 National security 18 Prevention 17 Terrorism 16 Scientists 15 Politics and government 13 Nuclear weapons 12 African American scientists 11 Armed Forces 11 Iraq War, 2003-2011 11 General 9 Military policy 9 Nuclear nonproliferation 9 Economic aspects 8 Nuclear arms control 8 Science 8 Appropriations and expenditures 7 Finance 7 Government and political science 7 Intelligence service 7 Military assistance, American 7 Research 7 SCIENCE 7 Afghan War, 2001-2021 6 Detention of persons 6 Economic assistance, American 6