Terrorism War on Terrorism, 2001-2009 Prevention 30 Government policy 17 International relations 14 Foreign relations 12 September 11 Terrorist Attacks, 2001 12 more ... Politics and government 10 National security 8 Islam 6 Religious aspects 6 Jihad 5 Intelligence service 4 Social aspects 4 Terrorists 4 History 3 Influence 3 Iraq War, 2003-2011 3 Anti-Americanism 2 Evaluation 2 International cooperation 2 Islamic fundamentalism 2 Social conditions 2 World politics 2 Afghan War, 2001-2021 1 Biometric identification 1 Civil defense 1 Cold War 1 Congresses 1 Criminal justice, Administration of 1 less ...