Despite the arrival of international troops and ongoing peace talks, the crisis in the African nation of Sudan remains as severe as ever.

A campaign of what the United Nations describes as "ethnic cleansing" by Arab militias against non-Arab villagers has created a climate of terror across the huge Darfur region in Sudan's west.

Tens of thousands are estimated to have died and more than 2 million people have been displaced by a civil war which has created widespread famine. World aid groups are struggling to avert an even greater humanitarian disaster.

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