Each drone ran on four fat, deeply treaded tires and looked remarkably like a child’s radio-controlled toy. But no child had ever had such a toy. The drones were armored with ceramic composite plates and armed with fully automatic pistols mounted in extendable turrets. Each was equipped with a dog-brain that allowed it limited tactical responses when the rigger wasn’t directly controlling it. The expert system wasn’t a great shot or a canny fighter, but the drones would make good pillboxes capable of suppressive fire. Their small size made them difficult targets.