Sudan's burgeoning capital city, Khartoum, is a microcosm of the nation. Locals migrate to this desert oasis from every region of the country. It's cosmopolitan — people in Khartoum liken it to what they believe London to be like — and it's Sudan's center for jobs and infrastructure. But the city is also soaking up precious resources that are needed in places like Darfur and in southern and eastern Sudan.
As part of our series on the "Urban Frontier," NPR's Gwen Thompkins reports from Khartoum.