Khartoum society, while others settled in large slums at the outskirts of the city. Since the mid-1980s, large numbers of refugees from South Sudan and Darfur fleeing the violence of the Second Sudanese Civil War and Darfur conflict have settled around Khartoum. In 1991, Osama bin Laden purchased a house in the affluent al-Riyadh neighborhood of the city and another in Soba. He lived there until 1996, when he was banished from the country. Following the 1998 U.S. embassy bombings, the United States accused bin Laden's al-Qaeda group and, on 20 August, launched cruise missile attacks on the al-Shifa pharmaceutical factory
Khartoum (state) locality are the tribe of Shiheinat, and in Khartoum North the tribes of Abdallab and Batahin. In the East Nile are the tribes of Abu Dileig, Batahin, and Kawahla, with the tribe of Iseilat in Um-Dowan. Most of the population works in government service, the private sector, and banking. There is also a large number of merchants, and migrants and displaced people working in marginal activities. In the countryside most people are engaged in agriculture and grazing and thus supply the capital, Khartoum, with vegetables, fruits, and dairy products. There are also some residents living on the banks of the