Dodoma was historically an important stop on caravan routes between the Swahili Coast and Lake Tanganyika, and later a major railway junction. Tanzania has over 120 tribes and Swahili and English are the main languages. Key figures include Malcolm X, who was assassinated in 1965 after becoming a prominent black nationalist leader in the US. Tanzania has significant wildlife and Lake Tanganyika is the largest lake in central Africa, known for its unique fish species.