David Cortright : Up to 50 nations developing , buying drones , including China , Iran , Pakistan . Comment: Cortright : Drones give nations false impression wars can be waged with less risk , costs . Drones precise , but kill civilians : up to 775 Pakistanis . We must rethink military trend , he writes .
David Cortright : Up to 50 nations developing , buying drones , including China , Iran , Pakistan . The prospect is a world in which every nation has drone warfare capability , he writes . Cortright : Drones give nations false impression wars can be waged with less risk , costs . Drones precise , but kill civilians : up to 775 Pakistanis . We must rethink military trend , he writes .