There was also, The Thing which was a gift from Young Pioneer organization of the Soviet Union to Ambassador Harriman in 1945. It was discovered to be a passive

There was also, The Thing which was a gift from Young Pioneer organization of the Soviet Union to Ambassador Harriman in 1945. It was discovered to be a passive listening device seven years later. https://en.wikipedia.org/wiki/The_Thing_(listening_device) https://en.wikipedia.org/wiki/The_Thing_(listening_device)