Peter Bergen says use of drones for military purposes is going to proliferate . Drones enable warfare to be fought at lower cost without risking pilots ' lives . They offer more precise targeting but still will kill civilians and thus will stir debate . Bergen : " The U.S. has been using unmanned aircraft in Iraq since the early 2000s, with a small number of strikes against al Qaeda targets.
Peter Bergen says use of drones for military purposes is going to proliferate . Drones enable warfare to be fought at lower cost without risking pilots ' lives . They offer more precise targeting but still will kill civilians and thus will stir debate . Bergen : Ethical and legal questions raised by the use of armed drones abound .