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EDUCATION
7
SECURITY MEASURES
7
HISTORY
6
AFRICAN AMERICANS
4
HISTORY, MILITARY
4
INSURANCE
4
LAW
4
MILITARY HISTORY
4
AIRPORTS
3
BLACK PEOPLE
3
ECONOMIC CONDITIONS
3
ECONOMICS
3
FAMILIES
3
FAMILY LIFE EDUCATION
3
GOVERNMENT POLICY
3
MARRIAGE
3
RACE RELATIONS
3
TERRORISM
3
AERONAUTICS, COMMERCIAL
2
BIRTH CONTROL
2
COMPUTER NETWORKS
2
CRIME
2
CRIMINAL LAW
2
DETECTION
2
ECONOMIC POLICY
2
ECONOMÍA
2
EDUCATION, HIGHER
2
EVALUATION
2
EXPLOSIVES
2
MEDICAL CARE
2
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