Racing legend Al Unser Sr. has died at the age of 82 after a long battle with cancer.
'Big Al' was a four-time Indianapolis 500 winner - a feat accomplished by just three other drivers. His final victory in 1987 came at the age of 47, the oldest winner ever.
He's also part of a legendary racing family - his brother Bobby Unser and son Al Unser Jr. are also former Indy 500 winners.
Unser Jr. posted a tribute to social media: "He was a Great man and even a Greater Father. Rest in Peace Dad!"
Was Unser the greatest Indy driver ever?