Columbia subject headings:
Arab Spring, 2010-
Drone aircraft--Government policy.
Political geography.
Rhetoric--Political aspects.
Terrorism--Prevention.
Terrorism.
War--Causes.
War--Technological innovations.
Harvard subject headings:
Arab Spring, 2010-
Drone aircraft--Government policy.
Political geography.
Rhetoric--Political aspects
Terrorism
Terrorism--Prevention
War--Causes
War--Technological innovations.
Princeton subject headings:
September 11 Terrorist Attacks, 2001.
Terrorism--Prevention.
Terrorism.
War--Causes.
War--Technological innovations.