Subject
National security
Terrorism Prevention
41
September 11 Terrorist Attacks, 2001
20
Terrorists
16
Terrorists Travel Prevention
16
Admission of nonimmigrants Government policy
9
Rules and practice
9
Terrorism Government policy
9
Terrorism Risk assessment
9
Terrorists Recruiting
9
Visas Government policy
9
Intelligence service Evaluation
7
International travel regulations Security measures
7
Islamic fundamentalism
7
Terrorism Prevention Government policy
7
Terrorists Identification
7
Jihad
6
Terrorism
6
Terrorist safe havens
6
September 11 Terrorist Attacks, 2001 Influence
5
Terrorists Recruiting Prevention
5
Intelligence service
4
Political refugees Government policy
4
Radicalism Prevention
4
Terrorism Religious aspects Islam
4
Terrorist organizations
4
War on Terrorism, 2001-2009
4
Airline passenger security screening
3
Terrorism Finance Prevention
3
Terrorists Government policy
3
United States Foreign relations
3
United States Relations
3
Assassination
2
Asylum, Right of Government policy
2
Border security
2
Civil rights
2
Cyberterrorism Prevention
2
Federal aid to terrorism prevention
2
Governmental investigations
2
Hiding places
2
International travel regulations
2
Military intelligence
2
Pakistan Relations
2
Political stability
2
Prisoners of war
2
Refugees
2
Syrians Emigration and immigration Government policy
2
Taliban members Government policy
2
Terrorism Prevention Planning
2
Terrorism investigation
2
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