Prevention Terrorism -- 66 Terrorism 16 Government policy 7 War on Terrorism, 2001-2009 7 Prevention -- 6 Security measures 6 more ... Psychological aspects 5 Islam 4 Religious aspects -- 4 History 3 Human rights 3 Psychology 3 Social aspects 3 Terrorists -- 3 Aeronautics, Commercial -- 2 Airports -- 2 Finance 2 Hijacking of aircraft -- 2 International cooperation 2 Islam and politics 2 Jihad 2 Law and legislation 2 Merchant marine -- 2 Moral and ethical aspects 2 National security 2 National security -- 2 Prevention. -- 2 Risk assessment 2 Security measures -- 2 less ...