A boy works on his lesson in the corner of a classroom at Pibor Primary School in Pibor, South Sudan, June 25, 2012. For decades, Sudan's southerners fought the country's predominately Arab rulers in the north. More than two million people died before the fighting ended in a peace deal in 2005. In a referendum promised by the pact, 99 percent of the southerners chose to secede, and on July 9, 2011, the flag of South Sudan was raised over Juba, the rickety new capital. Picture taken June 25, 2012. To match Special Report SOUTH-SUDAN/GOVERNED REUTERS/Adriane Ohanesian (SOUTH SUDAN - Tags: ANNIVERSARY POLITICS EDUCATION TPX IMAGES OF THE DAY)