7 . Jennifer Rowland , Peter Bergen : Drones cost a fraction of a fighter jet . They say drone industry will double in size in 2013 . Israel , China , China , Russia are among nations developing military drones .
Jennifer Rowland , Peter Bergen : Drones cost a fraction of a fighter jet . They say drone industry will double in size in 2013 . Israel , China , China , Russia are among nations developing military drones .