Prosecutors decided last month to increase the charges against former Deputy Prime Minister Radoslav Brdjanin,51, and Military Chief Momir Talic, 57, two of the highest ranking officials who are accused of organizing the expulsion of Croats and Muslims from northwestern Bosnia in 1992.  The former Bosnian Serb officials pleaded not guilty on Tuesday to 11 new war crimes charges, including genocide.  Both are accused of masterminding one of the bloodiest campaigns of the 1992-95 Bosnian conflict, torturing, murdering and expelling thousands from the Prijedor region in northwest Bosnia in 1992.  The indictment says Detainees were continuously subjected to or forced to witness inhumane acts including murder, rape, sexual assault, torture and beating.