It's part of a new public relations & civic service initiative offered by the NSA. If you forget where you parked your car all you have to do is whisper near your phone (Even if it's off!) "Hey, NSA guys, where's my car?"
They'll honk the horn and, if necessary, send a micro drone to your location that you can follow to it if it's too far away to hear the horn or you're hearing impaired.
They'll honk the horn and, if necessary, send a micro drone to your location that you can follow to it if it's too far away to hear the horn or you're hearing impaired.