The Great Seal Radio Bug - The Soviet Listening Device Hidden In Plain Sight
31:37
SOLVING the Mystery Behind a Soviet Spy Bug : A True Masterpiece of Technical Elegance!
8:40
The “Thing” The Great Seal Bug.
14:17
The Million Watt Jamming Wall Designed To Keep You In The Dark
16:19
The Invisible Shortwave Transmissions Of London's Secret Diplomatic World
28:19
Leon Theremin Changed Spying FOREVER with this 1940s invention!
13:38
The Strange Circles Of Japan’s Signals Intelligence Network
22:38
Listening To This Radio Scanner Is ILLEGAL!
14:19