Developing common or complementary approaches to what Europeans call societal security and what Americans call homeland security is a major priority for the transatlantic community in 21st century. Threats such as terrorism, proliferation of weapons of mass destruction, regional conflict, state failure, and organized crime require a committed transatlantic partnership in order to be successful. Five European country case studies are offered here, along with implications for the United States. This book is the result of a collaborative effort between the Center for Transatlantic Relations and Johns Hopkins University - SAIS in Washington, D.C., the Swiss Center for Security Studies at ETH Zurich; and Crismart at the Swedish National Defence College. Contributors include Axel Hagelstam (National Emergency Supply Agency, Finland), Stein Hendriksen (Norwegian Directorate of Civil Protection and Emergency Planning), Jan-Philipp Kessler (Swiss Federal Institute of Technology), Jan Metzger (Zurich State Department of Economy), Thomas Pankratz (Austrian Ministry of Defense), and Anu Sallinen (Finnish Defense Staff).