NEW : Clinton arrives in Pakistan after stern words on the need to tackle terror . The effort suffered a major setback following the killing of Burhanuddin Rabbani , an Afghan political figure and former president who led the peace council . Clinton : We 're going to be fighting , talking and building in Afghanistan . Joint Chiefs of Staff chief , Joint Chiefs of Staff chairman accompanying her . Hillary Clinton says she is working toward a peaceful Pakistan .
NEW : Clinton arrives in Pakistan after stern words on the need to tackle terror . Clinton : We 're going to be fighting , talking and building in Afghanistan . Joint Chiefs of Staff chief , Joint Chiefs of Staff chairman accompanying her . Hillary Clinton says she is working toward a peaceful Pakistan .