This paper explores the recent interest in expanding criminal justice and criminology through research and funding initiatives and the development of curricula in security, homeland security, and security management. Parallels and distinctions are drawn between the evolution of criminal justice and more recent extensions of the field in areas that have had varying levels of success. The popularity of security studies may be due in part, to government grants and the political rhetoric of homeland security, jobs that have opened up as well as the opportunities for research, consulting, and training brought about by the events of 9/11. Pressures on the field to legitimize the study of security issues are discussed with the conclusion that various forms of security studies will serve as a subdiscipline in criminal justice for some time.