This publication discusses and compares various reactions to the challenges of mass-scale terrorism. Five countries are at the centre of the research: The United States, Great Britain, France, Turkey and Russia, each of them being a victim of multiple terrorist attacks. This volume is grounded in a conceptual presumption that the countries directly affected by terrorism produce different types of responses. Of course, there is much in common in all five country cases, but the most interesting part of the research exercise is identifying the divergences. Based upon this comparative analysis, this volume discusses a variety of counter-terrorism policies and strategies. Hopefully, these analyses will provide the basis for improving the counter-terrorism approaches for each of the countries as we learn from each other.