Columbia subject headings:
Aeronautics, Commercial--Passenger traffic--Security measures--United States.
Air travel--United States.
Airline passenger security screening--United States.
Airports--Baggage handling--United States.
Airports--Employees--Selection and appointment--United States.
Harvard subject headings:
Aeronautics, Commercial--Passenger traffic--Security measures--United States.
Air travel--United States
Airline passenger security screening--United States.
Airports--Baggage handling--United States.
Airports--Employees--Selection and appointment--United States.
Princeton subject headings: