Al Unser, Sr., one of the foremost names in the sport of auto racing, is known primarily for his remarkable success at the Indianapolis 500. He is the second of three generations of racecar drivers, and it is arguable that no other family has left such an indelible mark on a sport as the Unser family has done on auto racing. Al's uncle, Louie Unser, attempted qualification at the Indianapolis 500 in 1940;

his brother Jerry was national stock car champion in 1956 but was killed in 1959 while on a practice lap at Indianapolis. The two surviving brothers, Al and Bobby Unser, went on to win a total of seven Indianapolis 500 races, while Al's son, Al Unser, Jr., is successful in his own right, having twice won at Indianapolis by the late 1990s. Johnny Unser (Jerry's son) and Robby Unser (Bobby's son) are also third generation...