NEW : Sources say Petraeus will resign from the military once again . The decorated general is expected to be promoted to be CIA director . Sources say Petraeus did n't want to become Joint Chiefs chairman . While the CIA role in Iraq , in combating al Qaeda and in the Pakistan drone operation `` has grown tremendously '' under Petraeus ' military command , he also understands the limitations of what the CIA can do , Rieder said . They cite Abrams ' experience working with the CIA in war zones .
NEW : Sources say Petraeus will resign from the military once again . The decorated general is expected to be promoted to be CIA director . Sources say Petraeus did n't want to become Joint Chiefs chairman . They cite Abrams ' experience working with the CIA in war zones .