I hate Obama's drone war--but, under the law, he has a perfect right to fight one. Armed drones in war may be new, but their use introduces no new ethical or legal issues.
In the Western world, the laws of war are built on the foundation of the Just War tradition. The principles for employing force are fairly simple and realistic. The use of force has to be under a competent sovereign authority. And it has to be proportional--that is, the level of force used must be appropriate to the military mission, with appropriate care taken to avoid harming innocents.
Those rules apply regardless of the weaponry involved, be it hand grenades, nukes... or armed drones. As I said, nothing new here.
Our laws and treaty obligations place a legal framework around the principles of the Just War tradition. At times, the United States has modified these legal instruments to account for the unusual destructive power of certain weapons -- their ability to inflict intentional and unnecessary cruelty or to pose an indiscriminate threat to innocents. For example, the U.S. helped pen conventions on poison gas and biological weapons, as well as treaties to help stem the proliferation of nuclear weapons.
Drones, however, present none of these issues. There is nothing novel or unusual about the destructive potential of a drone strike.
Pretty much every weapon in the U.S. arsenal may be used in war, provided the users (1) have the legal authority to use them, (2) aim them at that legitimate targets, and (3) use them according to the rules of engagement laid out by their commanders. All those bases are covered when it comes to drones.
Congress has given the commander-in-chief an Authorization to Use Military Force--AUMF in Washington-speak--and that's all the legal authority he needs. And, as Mark Bowden's article in this month's The Atlantic illustrates well, the administration has plenty of rules for running armed drone operations.
Here is the brutal reality of war: It always requires targeting enemies with lethal force. It is an operational necessity. And it is legal.
The problem some people have with killer drones in combat has little to do with the technology of flying weapons. As my colleague at Heritage, Cully Stimson testified before Congress, "Much criticism of drone warfare is actually criticism of broader policies, such as the application of the law of armed conflict to the present conflict, geographical limitations on such conflict, and targeting decisions. Whether a strike is carried out by a drone or an airplane (with the pilot in the vehicle itself) has little or no bearing on these broader policy issues."
Turning drone strikes into a battle of legal briefs is more an act "lawfare" than warfare--an attempt to hamstring U.S. military operations by clothing complaints in legal-sounding arguments. Amnesty International declared in its 2012 report that U.S. operations do not "recognize the applicability of international human rights law," an assertion the report conclusively fails to document. Christof Heyns, the UN special rapporteur on extrajudicial killings and summary or arbitrary executions, stated at a conference in Geneva that some U.S. operations might constitute "war crimes." Though he has been on the job for many months, he has yet to prove that allegation.