Subject
National security
Terrorism Prevention
74
Rules and practice
57
United States Foreign relations
55
Appropriations and expenditures
53
Intelligence service
42
United States Military policy
37
Cyberterrorism Prevention
32
United States Armed Forces
31
Military planning
28
Terrorism Religious aspects Islam
28
United States Defenses
28
Border security
26
United States Armed Forces Operational readiness
25
Deterrence (Strategy)
22
Security, International
22
Terrorism
22
Nuclear weapons
21
Management
20
Nuclear nonproliferation
19
Computer security
17
Evaluation
17
Immigration enforcement
17
China Foreign relations
16
Russia (Federation) Foreign relations
16
Jihad
15
Terrorism Prevention Government policy
15
Visas Government policy
15
Russia (Federation) Military policy
14
Terrorism Risk assessment
14
Illegal immigration
13
China Military policy
12
Democracy
12
Operational readiness
12
Cyberinfrastructure Security measures
11
Cyberspace operations (Military science)
11
Emergency management
11
Islamic fundamentalism
11
Planning
11
Computer networks Security measures
10
Cyberterrorism
10
Humanitarian assistance, American
10
Noncitizens
10
Nuclear weapons Government policy
10
Terrorists Travel Prevention
10
Astronautics, Military
9
Nuclear nonproliferation Government policy
9
Personnel management
9
Ballistic missile defenses Finance
8
Military assistance, American
8
more ...