Gathering visual information.
On April 28 1968 Peter Derichs and Jan Brandenberg left Cape Town and travelled north across the Orange River to South West Africa (Namibia) to study the feasibility of lowering scooters into the depths of the canyon and traveling along its base to Ai Ais.
After a week they returned with the news that it was ninety-nine per cent impossible. We decided to take that 1 percent chance and go anyway.
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