Columbia subject headings:
Aeronautics, Commercial--Passenger traffic--Security measures--United States.
Airports--Baggage handling--United States.
Airports--Security measures--United States.
Harvard subject headings:
Aeronautics, Commercial--Passenger traffic--Security measures--United States.
Airline passenger security screening--United States.
Airports--Baggage handling--United States.
Airports--Security measures--United States
Federal government--United States
Princeton subject headings:
Aeronautics, Commercial--Passenger traffic--Security measures--United States.
Airports--Baggage handling--United States.
Airports--Security measures--United States.