Columbia subject headings:
Border patrols--United States.
Border security--United States.
Human capital--Government policy--United States.
Ports of entry--Security measures--United States.
U.S. Customs and Border Protection--Personnel management.
Harvard subject headings:
Princeton subject headings:
Border patrols--United States.
Border security--United States.
Human capital--Government policy--United States.
Ports of entry--Security measures--United States.
U.S. Customs and Border Protection--Personnel management.