Terrorists Terrorism 148 Prevention 70 Islam 38 Religious aspects 38 Government policy 35 Psychology 31 more ... Jihad 26 Recruiting 25 Radicalism 19 Islamic fundamentalism 16 War on Terrorism, 2001-2009 15 Domestic terrorism 12 History 12 Psychological aspects 12 National security 11 Radicalization 11 Legal status, laws, etc 10 Muslims 9 Identification 8 terrorism 8 Social networks 7 Suicide bombings 7 Violence 7 Internet and terrorism 6 Law and legislation 6 Noncitizens 6 Political violence 6 September 11 Terrorist Attacks, 2001 6 Suicide bombers 6 less ...