Abstract: | Public international law recognizes the right of states to protect themselves and their subjects against threats and damage from within their territory and outside. In the international sphere, the means and methods of national protection are restricted by the extraterritorial jurisdiction of courts and the laws they enforce.Criminal justice today is being confronted on an ever increasing scale by international criminal offenses that impinge on domestic concerns: drugs, securities and financial manipulations, money laundering, and terrorism, to mention only a few. This article discusses some of the issues that arise under the United States Constitution when criminal justice agencies are called upon to enforce U.S. laws beyond U.S. territorial limits. The principles of extraterritorial jurisdiction are discussed along with a number of United States court cases pointing to the importance of this new area of criminal justice. |