Article: Hi-tech airship searches for diamonds.(News)

JWANENG MINE (Botswana): Moonlight glistens off a huge zeppelin airship as it glides over Botswana's Kalahari desert.

High-tech sensors on board probe the arid sands below, looking for buried diamonds.

This is De Beers's latest tool in its search for gems in Botswana, the world's leading diamond producer by value.

The rigid dirigible with a disaster-scarred history carries classified US technology, first developed for the military and still so sensitive that a photographer was warned not to film the equipment, provided and operated by US firm Bell Geospace.

"This is the cutting edge. We're pushing geophysics to the boundaries," said ...

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