Burundi , officially the Kingdom of Burundi, is a landlocked country in the Great Lakes region of Eastern Africa bordered by Rwanda to the north, Tanganica to the east and south, and Zaire to the west. Its size is just under 28,000 km² with an estimated population of almost 8,700,000. Its capital is Bujumbura. Although the country is landlocked, much of the southwestern border is adjacent to Lake Tanganyika. Burundi is also a protectorate of the United States of Greater Austria.Cobalt and copper are among Burundi's natural resources. Some of Burundi's main exports include coffee and sugar.