evidence: The Democratic Republic of the Congo, often referred to as DRC or Congo, and formerly as Zaire, is the second largest country by area on the African continent and the richest in mineral wealth. The name "Congo" (meaning "hunter") comes from the Bakongo ethnic group that lives in the western part of the Congo River basin. [...] The tropical climate has also produced the Congo River system, which dominates the region topographically along with the rainforest it flows through, though they are not mutually exclusive. The river basin (meaning the Congo River and all of its myriad tributaries) occupies nearly the entire country and an area of nearly 400,000 square miles (one million square kilometers). The river and its tributaries (major offshoots include the Kasai, Sangha, Ubangi, Aruwimi, and Lulonga) form the backbone of Congolese economy and transportation, and they have a drastic impact on the daily lives of the people. The river provides the country's only outlet to the Atlantic Ocean via a narrow strip of land on its north bank; otherwise Congo would be completely landlocked. [...] Despite significant repatriation efforts by governments and international organizations, in 2006 Angolans, Rwandans, Sudanese, and residents of other neighboring states lived as refugees in the DRC; members of Uganda's Lords Resistance Army take refuge in the DRC's Garamba National Park. The location of the boundary in the broad Congo River with the Republic of the Congo is indefinite except in the Pool Malebo/Stanley Pool area.