Smoke from Crash, 1964 Indianapolis 500, Indianapolis, Indiana, May 1964

Tragedy marred the 1964 Indianapolis 500. Drivers Eddie Sachs and Dave MacDonald died in a seven-car crash just two laps into the race. After the fiery accident, Indy officials required cars to carry less fuel in future races and effectively banned gasoline in favor of methanol. Gasoline fires produced thick black smoke that obscured accident scenes. Methanol fires were smokeless.