More than six years after Operation Ark targeted a $50m designer drug ring, the Weekend Herald can reveal the story of London Underground. Among the characters were a Breaking Bad-style scientist, a banker and a

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Stripping and science

From Cambodian jungle, to Chinese laboratory

Operation Ark

A legal loophole

What's in a guilty mind?

Six years of secrecy

The London Underground saga

Sentences for Operation Ark and Greenstone