Columbia subject headings:
Harvard subject headings:
Bin Laden, Osama, 1957-2011.
Intelligence service--United States--Evaluation
National security--United States
Qaida (Organization)
September 11 Terrorist Attacks, 2001
Terrorism--United States--Prevention
Princeton subject headings:
Bin Laden, Osama, 1957-2011.
Intelligence service--United States--Evaluation.
National security--United States.
Qaida (Organization)
September 11 Terrorist Attacks, 2001.
Terrorism--United States--Prevention.