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That Time CIA Used Tiger Droppings as a Covert Tracking Device

There are only approx 3,900 wild tigers left in the world today. However, during the Vietnam War the Indochinese tiger population was healthy & thriving, providing us a creative way to covertly track movement of North Vietnamese & Viet Cong.

During the war, the US needed to monitor opposition location & movement.
CIA scientists invented a seismic intruder detection device:
It could be strategically placed to monitor movements up to 300 meters away.
That’s where tigers came in.
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