Columbia subject headings:
Biometric identification--United States.
Customs administration--United States.
Illegal aliens--Government policy--United States.
Illegal aliens--United States--Identification.
National security--United States.
Harvard subject headings:
Biometric identification--United States.
Customs administration--United States
Illegal immigration--Government policy--United States.
Illegal immigration--United States.
National security--United States
Noncitizens--Government policy--United States
Noncitizens--United States--Identification
Princeton subject headings:
Biometric identification--United States.
Customs administration--United States.
Illegal aliens--Government policy--United States.
Illegal aliens--United States--Identification.
National security--United States.