In the 1960s, the CIA was hard at work on turning housecats into head-to-tail listening devices. It went like this: a veterinarian would sedate a small feline, cut them open, and insert a microphone into their ear, a radio transmitter into the base of the head, and run a thin wire along the cat's coat all the way into its tail, which was seen as a nature-made antennae. The hope was that these kitties could casually be deployed to the Kremlin, and pick up Soviet intelligence without notice. But by 1967, like so many pet projects before it, Operation Acoustic Kitty was canceled. Many attribute the abrupt end of the experiment to the fact that, at the outset of a test run in Washington, D.C., the experimental radio cat was hit by a car immediately after its deployment.