A new land speed record was set today in Utah by British driver Andy Green, driving a specially designed JCB Hydromax car, which reached 406.320 miles per hour. The milestone was set in the bright yellow tubular vehicle, powered by two hydrogen internal combustion engines, which Green calls the “fuel of the future” at the Bonneville Salt Flats in Utah. He easily beat the previous class record for a hydrogen engine, which had stood at 185 mph. The driver is a former Royal Air Force fighter pilot who is the only person to have broken the sound barrier on land,...