The book examines the Military Response, analyzing legal issues related to treating terrorism as an armed conflict. These include the legal authority to use military force; determining when the law of armed conflict comes into force; the law of targeting and how this authority is applied to terrorist operatives; preventive detention; and prosecution of terrorists by military commission. The book also analyzes the Law Enforcement Response to international terrorism, including the legal framework for gathering counter-terrorism intelligence information, prosecuting terrorists and their sponsors, and freezing terrorist assets, domestically and internationally. Finally, the book examines the federal statutes authorizing civil liability for personal injury or death caused by acts of international terrorism.