[00:11.59]What mistake was made? [00:15.43]The great racing driver, Sir Malcolm Campbell, was the first man to drive at over 300 miles per hour. [00:26.14]He set up a new world record in September 1935 at Bonneville Salt Flats, Utah. [00:36.32]Bluebird, the car he was driving, had been specially built for him. [00:42.92]It was over 30 feet in length and had a 2, 500-horsepower engine. [00:50.42]Although Campbell reached a speed of over 304 miles per hour, [00:56.20]he had great difficulty in controlling the car because a tyre burst during the first run. [01:04.39]After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour. [01:15.53]However, a few days later, he was told that a mistake had been made. [01:22.11]His average speed had been 301 miles per hour. [01:27.54]Since that time, racing drivers have reached speeds over 600 miles an hour. [01:35.58]Following in his father's footsteps many years later, Sir Malcolm's son, Donald, also set up a world record. [01:45.91]Like his father, he was driving a car called Bluebird.