Columbia subject headings:
Contracting out--United States.
Employee screening--United States.
Government contractors--United States.
United States. Dept. of Homeland Security--Management.
United States. Dept. of Homeland Security--Procurement.
Harvard subject headings:
Contracting out--United States.
Employee screening--United States
Government contractors--United States.
United States. Department of Homeland Security--Management.
United States. Department of Homeland Security--Procurement.
Princeton subject headings:
Contracting out--United States.
Employee screening--United States.
Government contractors--United States.
United States. Department of Homeland Security--Management.
United States. Department of Homeland Security--Procurement.