This book considers contending views on security ten years after the terrorist attacks on New York and Washington in September 2001. In this context the editors have endeavoured to offer a diverse range of perspectives on security with the intention of contributing to existing literature and understanding of what security means in the first decade after 9/11. The editors have invited perspectives from Asia, Europe, Australia, Africa, as well as the United States. Traditional and non-tradition approaches towards security are examined. The diversity of views in this volume is indicative of the range of complex and challenging security issues that exist in the new international environment. This book's main focus is to showcase important themes in the discourse on broader post-9/11 security debates.