Slashdot discusses a story named US Sentinel Drone Fooled Into Landing With GPS Spoofing.
Their summary: "Following up on the earlier Slashdot story, the Christian Science Monitor now reports that GPS spoofing was used to get the RQ-170 Sentinel Drone to land in Iran. According to an Iranian engineer quoted in the article, 'By putting noise [jamming] on the communications, you force the bird into autopilot. This is where the bird loses its brain.' Apparently, once it loses its brain, the bird relies on GPS signals to get home. By spoofing GPS, Iranian Engineers were able to get the drone to 'land on its own where we wanted it to, without having to crack the remote-control signals and communications.'"