Southern Kordofan, Blue Nile and the Nuba Mountain region straddle Sudan and South Sudan's ethnic and political lines.

CNN: Sudanese army says it killed more than 50 rebels

The group controls much of the Nuba mountains in Southern Kordofan and launches guerrilla raids in Blue Nile state.

ECONOMIST: Sudan and South Sudan

Like her athletes, her portraits of the Nuba were far less about the individuals she photographed than what their sculpted, muscular bodies represented.

ECONOMIST: Leni Riefenstahl: Hand-held history | The