FILE - Al Unser crosses finish line on May 28, 1978 ,at Indianapolis Motor Speedway to win 62nd Indianapolis 500-mile race in Indianapolis. It was Unser's third win at Indy. Al Unser was the third member of one of America’s most-accomplished racing families to die in 2021, following his older brother Bobby, a three-time Indy champion, and Bobby Unser Jr. Known as “Big Al” after his son also became a racing star, Unser was one of four drivers who won the Indy 500 a record four times, with victories in 1970, 1971, 1978 and 1987. (AP Photo, File)

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