Cops Across Borders is the first book to examine the policies and issues that lie at the intersection of U.S. foreign policy and U.S. criminal justice. Drawing on interviews with nearly 300 U.S. and foreign law enforcement officials in nineteen countries as well as extensive historical and contemporary materials, Ethan Nadelmann examines how and why U.S. law enforcement officials have extended their efforts beyond American borders, how they have dealt with the challenges confronting them, and why their efforts have proved more or less successful.