ince the nineteenth century, when cameras were first attached to high-altitude balloons or harnessed to carrier pigeons, humankind has sought aerial vantage points for observing the planet. Thanks to declines in cost and improvements in control technology, today this capability is available to the public at large through civilian drones—not only for the fun of remote piloting but also for observing and monitoring our world. Businesses and governments, small and large, are taking advantage of this new technology as well.