May 30

Roy Harroun, at the wheel of a Nordyke Marmon & Company Wasp, won the first Indianapolis 500 motorcar race on the 30th in 1911. What makes Harroun’s victory interesting is that it was achieved in the first automobile to make use of a rear-view mirror. Prior to this, automobile races had to be conducted with a team: the driver and a mechanic to keep track of the other cars.