Khartoum is currently located in the heart of the city. A new international airport is currently being built about south of the city center. There have been delays to start construction because lack of funding of the project but it is expected that the airport will be completed sometime in 2018. It will replace the current airport in Khartoum as Sudan's main airport. Bridges over the Blue Nile connecting Khartoum to Khartoum North: Khartoum has rail lines from Wadi Halfa, Port Sudan on the Red Sea, and El Obeid. All are operated by Sudan Railways. Some lines also extended to some
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