This volume consists of research papers written under editor Sienho Yee's supervision at the University of Colorado School of Law. The papers address interesting and difficult issues relating to substantive international crimes and the international regimes of punishment. Issues discussed include the Rome Statute and the crystallization of the norm proscribing statutes of limitations for serious international crimes; acts of terrorism as crimes against humanity under the Rome Statute; the balance between military necessity and civilian immunity; juvenile death penalty under international law; the practical applications of Ne Bis in Idem; and the possible federalization of the crime of torture. This volume is of great value to scholars and practitioners in international law and international relations, international criminal law, and to N.G.O. advocates.