Peter Bergen : American monopoly on drones is long gone ; 70 nations have them . He says drones will change warfare and lead to a new arms race . Given the relatively low costs of drones -- already far cheaper than the costs of a fighter jet and of training a fighter jet pilot -- armed drones will play a key role in future conflicts . Score: 6 Bergen : U.S. use of drones is setting a precedent without enough discussion of the legal issues .
Peter Bergen : American monopoly on drones is long gone ; 70 nations have them . He says drones will change warfare and lead to a new arms race . Score: 6 Bergen : U.S. use of drones is setting a precedent without enough discussion of the legal issues .