This image released by Max shows Susie Wheldon, from left, Sebastian Wheldon, and Oliver Wheldon from the HBO documentary "The Lionheart." (Max via AP)
This image released by Max shows Oliver Wheldon, son of Dan Wheldon, in a scene from the HBO documentary "The Lionheart." (Max via AP)
FILE - IndyCar driver Dan Wheldon, of England, signals his second win of the Indianapolis 500 auto race at the Indianapolis Motor Speedway on May 30, 2011, in Indianapolis. Wheldon is the subject of a new HBO documentary "The Lionheart," premiering March 12. (AP Photo/Michael Conroy, File)
This image released by Max shows promotional art for the HBO documentary "The Lionheart," premiering March 12. (Max via AP)
This image released by Max shows Dan Wheldon, left, with his son Sebastian in a scene from the HBO documentary "The Lionheart." (Max via AP)
This image released by Max shows Dan Wheldon in a scene from the HBO documentary "The Lionheart," premiering March 12. (Michael Voorhees/Max via AP)