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Photo by: Abd Raouf

A Southern Sudanese woman reads a newspaper at a polling center during the second day of the independence referendum in the city of Um Durman, Sudan, on Monday, Jan. 10, 2011. Southern Sudan's military spokesman says 20 policemen in the disputed north-south region of Abyei have been killed and 30 more wounded in two attacks by Arab tribesmen and militia. (AP Photo/Abd Raouf)

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