Subject
Terrorism Prevention
Rules and practice
19
National security
14
Evaluation
12
National security Law and legislation
9
Terrorism Risk assessment
6
Intelligence service Law and legislation
5
Aeronautics, Commercial Security measures
4
Airline passenger security screening
4
Cargo handling Security measures
4
Fraud Prevention
4
Harbors Security measures
4
Interagency coordination
4
Management
4
Ports of entry Security measures
4
Shipping Security measures
4
Aeronautics, Commercial Freight Security measures
3
Afghan War, 2001-2021
3
Border security
3
Chemical terrorism Prevention
3
Electronic surveillance Law and legislation
3
Immigration enforcement
3
Intelligence service
3
Terrorism Religious aspects Islam
3
Weapons of mass destruction Government policy
3
Aeronautics, Commercial Passenger traffic Security measures
2
Airports Security measures
2
Biometric identification
2
Chemical plants Security measures Government policy
2
Civil rights
2
Crime prevention
2
Criminal investigation
2
Disclosure of information Law and legislation
2
Economic assistance, American
2
Emigration and immigration law
2
Illegal immigration Government policy
2
Internal security
2
Noncitizens Government policy
2
Operational readiness
2
Privacy, Right of
2
Railroads Security measures
2
Special forces (Military science) Forecasting
2
Special operations (Military science) Forecasting
2
Terrorism Forecasting
2
Terrorism Government policy
2
Terrorism Prevention Government policy
2
Terrorists
2
Transportation Security measures
2
United States Defenses Forecasting
2
United States Military policy Forecasting
2
more ...