Drivers' Championship. Hill, his countryman Jackie Stewart, and New Zealander and defending world champion Denny Hulme. The race was a straight fight between Hill and Stewart; the Scotsman led for several laps until Hill passed him. Hulme was running third, but he had a rear suspension failure and crashed on Lap 11. Swiss Jo Siffert decided to get in on the mix and took the lead, but he had to pit with a broken throttle cable. Stewart then fell back with when his engine started to misfire, his car's handling was going off and the car also had a fuel-feed problem. But Hill had no problems; and took victory and his second driver's championship. 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. The 1971 event was scheduled, with large fund deposited in a Swiss bank to help guarantee better crowd control, but after the death of Pedro Rodriguez, the plan was abandoned. Autódromo Hermanos Rodríguez (1986–1992) There had been a number of attempts to bring the Mexican Grand Prix back on the F1 calendar, one attempt being when it was originally scheduled in April 1980, two weeks after the US Grand Prix West, but was cancelled. American IndyCars arrived for a brief two-year visit in 1980 and 1981, racing as the Gran Premio Tecate on the Magdalena Mixhuca track now named after Mexico's two lost racing heroes, Autódromo Hermanos Rodríguez. The event was dominated by Rick Mears. A number of years later, work began on rebuilding the Hermanos Rodríguez circuit with much improved organisation. The circuit's layout was slightly shorter, the Peraltada's banking had been eased and the circuit was generally much safer than it had been. The Grand Prix returned in 1986 where the race played host to Austrian Gerhard Berger's first race win in his Benetton B186, in a race where an ill Berger outlasted his opposition as tyre problems struck most of the field. The circuit was still very rough and bumpy, however. 1987 saw the race