Crowd control
Crowd control in 1968 and 1970 contributed to cancellation of the event. In 1970, a record crowd of approximately 200,000 arrived to see Pedro Rodríguez, forcing officials to delay the race start by an hour as they struggled to control the crowd. At one point a dog ran across the track and was hit by Stewart. During the race, spectators threw bottles on the track. Amid the chaos, Clay Regazzoni trailed Jacky Ickx for a 1-2 Ferrari finish.