Since the first World Championship Grand Prix in 1950, red flags have been shown in seventy-eight races, with the latest one being at the 2021 Belgian Grand Prix on 29 August. A total of twenty-six races were restarted on the first lap, while thirteen were not restarted, nine because of rain and four due to crashes involving drivers. Another five races were stopped due to incidents that resulted in fatalities: The 1975 Spanish Grand Prix was stopped on lap twenty-nine and not restarted after Rolf Stommelen's car crashed into a spectator area, killing five people. The 1978 Italian Grand Prix was red-flagged after a massive crash that ultimately contributed to the death of Ronnie Peterson. The 1982 Canadian Grand Prix was halted on the first lap after Riccardo Paletti was killed when his car collided with the back of Didier Pironi's Ferrari. The 1994 San Marino Grand Prix was red-flagged following the fatal crash of Ayrton Senna, in which his car crashed into a wall at the Tamburello curve. The 2014 Japanese Grand Prix was red-flagged for a second time following a serious collision between Jules Bianchi and a recovery vehicle which would ultimately prove to be fatal.