Interpol's mission is to promote and improve international police cooperation. However, the organization is restricted by differences among nations in languages, judicial systems, laws, procedures and techniques, budgets, and investigative priorities. In the matter of international economic crime, the investigators must have in-depth knowledge of information technology and the flexibility to be able to continue their investigations when away from their home countries. Nations must be willing to sacrifice some national sovereignty, to find international solutions to international problems. The second article contains relevant case law and several case studies concerning the scope of the immunity granted to financial institutions providing information to the Federal Government about their customers under U.S. laws. References