text: African Union Urges Sudan, Rebels Overcome Impasse  ADDIS ABABA, Ethiopia (Reuters) - The African Union urged  Sudan's government and Darfur rebels to remain engaged in peace  talks Monday, after negotiations foundered over what the U.N.  has called the world's worst humanitarian crisis.
inputs: African Union Urges Sudan, Rebels Overcome Impasse  ADDIS ABABA, Ethiopia (Reuters) - The African Union urged  Sudan's government and Darfur rebels to remain engaged in peace  talks Monday, after negotiations foundered over what the U.N.  has called the world's worst humanitarian crisis.