AeroVironment, manufacturer of many tiny drones, is offering a different paradigm. Instead of carrying a missile, the drone is the missile. Unfolded from a size small enough to fit in a soldier’s rucksack — like a Switchblade; get it? — and launched from a tube, the spy cameras on board the drone scout an enemy position before the soldier controlling it sends it barreling into the target. It’s a strictly one-way mission.