According to a March 1967 report entitled “Views on Trained Cats [Redacted] for [Redacted] Use,” the CIA stuffed a real, live cat with electronic spying equipment and attempted to train it to spy on America’s Cold War rivals. The report states that Acoustic Kitty (as the project is commonly known) was a “remarkable scientific achievement.” Unfortunately, the report also states that the continued use of live cats as eavesdropping devices “would not be practical.”
According to Victor Marchetti (page 208), who worked as special assistant to the director of Central Intelligence:
“A lot of money was spent. They slit the cat open, put batteries in him, wired him up. The tail was used as an antenna. They made a monstrosity. They tested him and tested him. They found he would walk off the job when he got hungry, so they put another wire in to override that. Finally they’re ready. They took it out to a park and pointed it at a park bench and said, ‘Listen to those two guys…’ They put him out of the van, and a taxi comes and runs him over. There they were, sitting in the van with all those dials, and the cat was dead!”
Acoustic Kitty’s price tag was reported to be $15 million.