11. The “Passive Bug”
Vadim Fedorovich Goncharov the KGB’s equivalent of ‘Q’ from the Bond movies, created the bug. One such device was planted inside the large wooden replica of the Great Seal of the United States given by the Soviets to the US Ambassador to the USSR in 1945. It wasn’t discovered until eight years later.
20. Poison dart-shooting umbrella.
A similar umbrella was used to kill Bulgarian dissident writer Georgi Markov on the streets of London in 1978.
Markov was waiting for a bus to go to work when he felt a sting on the back of one leg and turned to see a man lifting an umbrella from the ground. He died three days later of poisoning from ricin. An autopsy uncovered a pellet the size of a pinhead embedded in his leg (source linked below).