Operation Acoustic Kitty
As much as you want to try to train cats, you can’t. They live by their own rules, so the fact that they botched a training program by the CIA shouldn’t be too surprising. It was called Operation Acoustic Kitty, and it set out to train cats to hang around the Soviet Union embassies with microphones and hearing devices implanted in their ears.
The operation cost $20 million and shut down after the first cat was killed by a taxi and the other cats were too easily distracted.