Subject
Terrorism Government policy
91
Terrorism Prevention
38
National security
24
Emergency management
22
Chemical terrorism Government policy
19
Bioterrorism Government policy
14
Nuclear terrorism Government policy
13
National security Law and legislation
12
War on Terrorism, 2001-2009
12
September 11 Terrorist Attacks, 2001
11
Intelligence service Evaluation
8
Chemical plants Security measures Government policy
6
Terrorism
6
United States Defenses Law and legislation
6
United States Foreign relations
6
Rules and practice
5
Terrorism Prevention Government policy
5
United States Military policy
5
Iraq War, 2003-2011
4
Terrorism Prevention International cooperation
4
Civil defense
3
Criminal investigation
3
Emigration and immigration law
3
Intelligence service
3
Jihad
3
Terrorism Religious aspects Islam
3
United States Defenses
3
Weapons of mass destruction
3
Clemency
2
Disaster medicine
2
Disaster relief Law and legislation
2
Exterritoriality
2
Interagency coordination
2
Intergovernmental cooperation
2
International law
2
International relations
2
Palestinian Arabs Politics and government
2
Restorative justice
2
Terrorism Finance Prevention
2
Terrorism International cooperation
2
Terrorism Political aspects
2
Terrorism Prevention Law and legislation
2
Terrorism Risk assessment
2
Terrorism victims' families Government policy
2
United States Politics and government
2
Victims of crimes Government policy
2
Victims of terrorism Government policy
2
War and emergency legislation
2
War and emergency powers
2
Weapons of mass destruction Government policy
2
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