When Mark Donohue died in Austria 40 years ago this week, motor racing lost not only a hugely successful driver, but also someone who would surely have enjoyed a long and productive career on the other side of the sport.
A mechanical engineering graduate from a wealthy New Jersey background, Donohue won everything in sight on the US scene, in every major category.
From 1966 until his death he enjoyed a close friendship and working relationship with Roger Penske, and together they were a formidable team.