https://en.wikipedia.org/wiki/ADE_651 https://en.wikipedia.org/wiki/ADE_651 'Some of the devices came with "detector cards" which were programmed, the fraudste

https://en.wikipedia.org/wiki/ADE_651 https://en.wikipedia.org/wiki/ADE_651 'Some of the devices came with "detector cards" which were programmed, the fraudsters claimed, to detect everything from explosives, to human beings and dollar bills through concrete, water and from great distances'