At what point is a drone a missile? Well, the point of no return. Made by Israel Aerospace Industries, the Harop is technically what's known as a "loitering munition," which is military jargon for "bomb that hangs around." Like the IAI Harpy that preceded it, the Harop is a drone that flies around until it gets close to its designated target. Then, like a hawk onto pray or an anvil in a cartoon, it becomes a weapon, crashing down with explosive force onto the target below. Earlier this summer, IAI successfully demonstrated the Harop. Here's how it works.