The refugee phenomenon is a major force in international politics. This is more so in sub-Saharan Africa where refugees are major actors in the affairs of their home and host countries. But, are refugees just victims of insecurity or also major causes of insecurity? Mogire analyses how and why refugees, victims of insecurity caused by persecution and the many incessant conflicts which continue unabated, have come to be viewed by scholars and practitioners as security threats. Using Kenya and Tanzania as empirical case studies, this volume examines the nature of this threat, its projection and responses. Moreover, it highlights how, if at all, these threats are different or similar to other security threats faced by these countries.