Columbia subject headings:
Charlie Hebdo Attack, Paris, France, 2015.
London Terrorist Bombings, London, England, 2005.
Madrid Train Bombings, Madrid, Spain, 2004.
September 11 Terrorist Attacks, 2001.
Terrorism--History--21st century.
Terrorism--Social aspects.
Victims of terrorism.
Harvard subject headings:
Demonstrations--Social aspects.
London Terrorist Bombings, London, England, 2005--Public opinion.
Madrid Train Bombings, Madrid, Spain, 2004--Public opinion.
September 11 Terrorist Attacks, 2001--Public opinion
Solidarity.
Terrorism--Public opinion.
Toleration
Princeton subject headings:
Charlie Hebdo Attack, Paris, France, 2015.
London Terrorist Bombings, London, England, 2005.
Madrid Train Bombings, Madrid, Spain, 2004.
September 11 Terrorist Attacks, 2001.
Terrorism--History--21st century.
Terrorism--Social aspects.
Victims of terrorism.