Columbia subject headings:
Political violence.
Terrorism--France--Paris--History--21st century.
Terrorism--Psychological aspects.
Terrorism--Social aspects.
Harvard subject headings:
Charlie hebdo.
Political violence
Terrorism--France--Paris--History--21st century.
Terrorism--Psychological aspects
Terrorism--Social aspects
Princeton subject headings:
Political violence.
Terrorism--France--Paris--History--21st century.
Terrorism--Psychological aspects.
Terrorism--Social aspects.