Columbia subject headings:
Qaida (Organization)
Terrorism--Government policy--United States.
Terrorism--Religious aspects--Islam.
Terrorism--United States--Prevention.
War on Terrorism, 2001-
Harvard subject headings:
Qaida (Organization)
Terrorism--Government policy--United States
Terrorism--Religious aspects--Islam
Terrorism--United States--Prevention
War on Terrorism, 2001-2009
Princeton subject headings:
Qaida (Organization)
Terrorism--Government policy--United States.
Terrorism--Religious aspects--Islam.
Terrorism--United States--Prevention.
War on Terrorism, 2001-2009.