Speed Record Salt Flats

FILE - British driver Andy Green gets strapped into his seat before setting a new unofficial world diesel powered land speed record of over 328 mph over two runs Tuesday, Aug. 22, 2006, on the Bonneville Salt Flats of Utah.

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Driver who broke the sound barrier attempts another land speed record in Utah

Driver who broke the sound barrier attempts another land speed record in Utah

The first and only person to break the sound barrier in a car has his eye on another speed record. British driver Andy Green set the land speed record for a diesel-powered car 20 years ago at Utah’s famous Bonneville Salt Flats. Green returns to the lunarlike landscape Tuesday to try to beat that 350.092 mph mark, this time with a hydrogen-powered car. The retired Royal Air Force fighter pilot aims to showcase the power of hydrogen as a clean-energy alternative. But hydrogen power is only as clean as its source, and the vast majority is currently produced from fossil fuels.