Prevention Terrorism 262 Government policy 48 Thesis 36 National security 31 Dissertations, Academic 30 United States 29 International cooperation 20 Drug abuse 18 History 17 Security measures 15 War on terrorism, 2001- 15 Terrorists 14 Accidents 13 Psychological aspects 12 September 11 Terrorist Attacks, 2001 12 Bioterrorism 11 Foreign relations 11 Law and legislation 11 Safety measures 11 Cyberterrorism 10 Nuclear terrorism 10 Politics and government 10 Religious aspects 10 Treatment 10 Counterinsurgency 9 Juvenile literature 9 Psychology 9 Cancer 8 Civil defense 8