This module aims to help criminal justice practitioners engaged in counter-terrorism to act more efficiently and swiftly by becoming more familiar with the mechanisms in place for extradition and mutual legal assistance and, in particular, with the tools afforded by the universal conventions and protocols for effective cooperation with foreign counterparts. A further aim is to provide practical guidance for dealing with the challenges posed by international cooperation to criminal justice officers worldwide. These challenges are usually due to the different ways that legal systems are structured and function.