Columbia subject headings:
Intelligence service--United States--Evaluation.
National security--United States.
Qaida (Organization)
September 11 Terrorist Attacks, 2001.
Terrorism--Government policy--United States.
Terrorism--United States--Prevention.
War on Terrorism, 2001-2009.
Harvard subject headings:
Intelligence service--United States--Evaluation
National security--United States
Qaida (Organization)
Reference works.
September 11 Terrorist Attacks, 2001.
Terrorism--Government policy--United States
Terrorism--United States--Prevention
War on Terrorism, 2001-2009
Princeton subject headings:
Intelligence service--United States--Evaluation.
National security--United States.
Qaida (Organization)
September 11 Terrorist Attacks, 2001.
Terrorism--Government policy--United States.
Terrorism--United States--Prevention.