A gold trader displays balls of unrefined gold with a piece of refined gold in Dunkwa-on-Offin, Ghana. (Photographer: Ekow Dontoh/Bloomberg)

The NASA Veteran Cracking Down on Illegal Gold Miners

(Bloomberg Businessweek) -- The illegal gold mine is hidden just past a thick grove of cocoa trees, a little ways off the two-lane road through Sagyimase, Ghana, a rural town a couple hours’ drive ...

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