Kai Bird, Pulitzer Prize–winning author and biographer of nuclear physicist J. Robert Oppenheimer, warns that the United States is setting a dangerous precedent with its use of military drones, and that the technology could proliferate quickly. Drone technology, he says, is simple. It's "boy scout stuff. And we're out there in the world now setting a precedent for using them on a military battlefield. Not a battlefield, in fact: Anywhere."