From the "Too Weird Not To Be True" Dept:
The C.I.A. seriously considered using cats to act as living recording devices and training them to hang out and collect valuable information via a transmitter implanted in their skull! The plan, called Project Acoustic Kitty, was actually researched and nearly deployed over the course of five years, and at the cost of $20 million.
As a matter of fact, one of the cats was wired and released near the Soviet Embassy, but managed to only get two steps out into the street before being hit and killed by a van. No joke. After that, the plans for the project were scrapped. Again, at the cost of $20 million...and one dead kitty.