Ayrton Senna da Silva was a Brazilian racing driver who won three Formula One world championships. He was killed in an accident while leading the 1994 San Marino Grand Prix. He is among the most dominant and successful Formula 1 drivers of all time and is considered one of the greatest drivers in the history of the sport. He remains the most recent driver fatality in Formula One. Senna began his motorsport career in karting, moving up to open-wheel racing in 1981, and winning the British Formula 3 championship in 1983. He made his Formula One debut with Toleman-Hart in 1984 before moving to Lotus-Renault the following year and winning six Grands Prix over the next three seasons. In 1988, he joined Frenchman Alain Prost at McLaren-Honda. Between them, they won all but one of the 16 Grands Prix that year and Senna claimed his first World Championship. Prost claimed the championship in 1989, and Senna his second and third championships in 1990 and 1991. In 1992, the Williams-Renault combination began to dominate Formula One. Senna nonetheless managed to finish the 1993 season as runner-up, winning five races and negotiating a move to Williams in 1994.