Unrest in the Arab world has amplified existing political tension in Yemen. Sustained mass protests and President Ali Abdullah Saleh's attempts to pre-empt a broad crisis with concessions have concentrated U.S. and international attention on the daunting array of political and development challenges facing Yemen. President Saleh now faces senior level defections from his regime and his departure may be imminent. Congress and U.S. policymakers may be concerned with prospects for stabilising Yemen and establishing strong bilateral relations with future Yemeni leaders. This book examines the current conflict in Yemen and its relation to U.S. national security.