But they might not be able to reach people who are hidden under the rubble of a collapsed building, for example. Ideally the drones would be built using nanote

But they might not be able to reach people who are hidden under the rubble of a collapsed building, for example. Ideally the drones would be built using nanotechnology, allowing them to be so small that they're almost invisible. Of course, coordinating their movements would require quite a powerful AI...