John Bergen says use of drones for military purposes is going to continue . Drones allow warfare to be fought at lower cost without risking pilots ' lives . They offer more precise targeting but still can kill pilots and thus will stir debate . Bergen : Bergen Ethical and legal questions raised by the use of armed drones remain .
John Bergen says use of drones for military purposes is going to continue . Drones allow warfare to be fought at lower cost without risking pilots ' lives . They offer more precise targeting but still can kill pilots and thus will stir debate . Bergen : Ethical and legal questions raised by the use of armed drones remain .