The paper Mapping ‘Regional Security’ in the Greater Horn of Africa: Between National Interests and Regional Cooperation, written by Dr Jonathan Fisher, explores the relationship between national interests and regional cooperation in the Greater Horn of Africa. It does so by analyzing three key questions: Who defines security in this region? What is the relationship between national security and regional security for these actors, and where are debates on this relationship articulated? This study also represents a preliminary output of the Friedrich-Ebert-Stiftung (FES) Addis Ababa Office’s project ‘Mapping National Security Interests in the Horn of Africa’.