Operation Gunman – how the Soviets bugged IBM typewriters
cryptomuseum.com
cryptomuseum.com
"As an incentive - probably demonstrating his own impatience - the leader of the team, Walter Deely, offered a US$ 5,000 bonus for the first person to find an eavesdropping device. Then, on the evening of Monday 23 July 1984, technician Michael (Mike) Arneson noticed an anomaly in the power switch of an IBM Selectric typewriter and decided to x-ray the whole machine from top to bottom"
0. Not exactly in the sense of today's "bug bounties".
This place is also awesome; just north of BWI: