Border surveillance will be widened



"Special sensors designed to look like rocks, plants and other natural objects could be seeded along borders, and transmit via satellite the sounds of voices, footsteps and vehicles of potential illegal aliens and smugglers."


The November 26, 1977 issue of Tucson Citizen


http://www.paleofuture.com/blog/2008/6/11/border-surveillance-of-1990-1977.html