Since the events of 9/11/01, there has been much discussion of the pores nature of US boarders and ports of entry. Considering the importance of the issue, there has been little academic debate regarding domestic and international policies to ensure port security, and even less academic research on the cooperation that such policies require and how cooperation is being advanced. We seek to remedy this deficiency.In recent years the US has taken the position as the lead actor in calling for more international cooperation and convergence of policies in how countries review containerized shipments and how they maintain security at ports. This paper asks if the US actions are motivated solely out of concern for securing its own ports, or if there is a genuine interest in cooperation for the sake of global security. Essentially, we will determine if the US' willingness to work with other countries is best represented by a power or interest based theory of cooperation. Additionally, we will determine the ramifications of the US' lead role, asking, if the US' reputation is hindering international cooperation on this important issue. Through the course of our research it will be necessary to review domestic policies and agency interaction, as well as the steps that are being taken on the international front. Finally, we hope to be able to address the implications of an international port security regime and to make some policy prescriptions. ..PAT.-Unpublished Manuscript [ABSTRACT FROM AUTHOR]