Columbia subject headings:
Aeronautics, Commercial--Security measures--United States.
Airline passenger security screening--United States.
Terrorism--Prevention--Government policy--United States.
Terrorists--United States--Identification.
United States. Transportation Security Administration--Rules and practice.
Harvard subject headings:
Aeronautics, Commercial--Security measures--United States
Airline passenger security screening--United States.
Terrorism--Prevention--Government policy--United States
Terrorists--United States--Identification.
United States. Transportation Security Administration--Rules and practice.
Princeton subject headings:
Aeronautics, Commercial--Security measures--United States.
Airline passenger security screening--United States.
Terrorism--Prevention--Government policy--United States.
Terrorists--United States--Identification.
United States. Transportation Security Administration--Rules and practice.