The M600P is a hand held device which can positively detect anomalies packed in a scanned item, etc (including the detection of contraband such as drugs, explosives, weapons, currency and much more). This is a fast and effective way to detect contraband concealed in objects such as tires, cargo, doors, walls and any other object or substance that may contain contraband.
When did money get verbotten?
When the Feds discovered they could confiscate it under the RICO statutes, I'd guess...