Unmanned aircraft to get cues from unattended ground sensors

Spy “rocks” talking to robot aircraft might be the future of USA-Mexico border surveillance if Lockheed Martin’s newly-updated network of small, easily disguised unattended ground sensors performs as promised. In February, the company plans to have its Self–Powered Ad–hoc Network (SPAN) automatically cue a hand-launched unmanned aircraft in a test held at Camp Roberts, California.…