Politics and government -- 114 Foreign relations -- 103 History -- 71 Biography -- 31 Presidents -- 26 World politics -- 16 Relations -- 15 more ... Terrorism -- 13 History 12 Biography 10 Politics and government 10 War on Terrorism, 2001-2009 10 Military policy 9 Civilization -- 8 Causes 7 Government policy -- 7 Legislators -- 7 September 11 Terrorist Attacks, 2001 7 Statesmen -- 7 World War, 1939-1945 -- 7 Economic conditions -- 6 National characteristics, American 6 Public opinion -- 6 Vietnamese Conflict -- 6 War on terrorism, 2001- 6 Decision making -- 5 History, Military -- 5 Influence 5 Iraq War, 2003-2011 5 Military policy -- 5 less ...