Klein, Pierre Keywords: United Nations | Terrorism | International peace and security | International politics | Use of force | International relations | Human rights | Mots clefs: Nations Unies | Terrorisme | Sécurité internationale | Politique internationale | Force | Relations internationales | Droits de l'homme | ABSTRACT Pierre Klein, Professor at the Université libre de Bruxelles, begins his course by identifying the very notion of terrorism to report on the impact of terrorism on international law. He then takes a step backward and plac…