Today, 1 May 2012, it is 18 years ago that Ayrton Senna da Silva perished at the wheel of his Williams-Renault on the Autodromo Enzo e Dino Ferrari near Imola, Italy, during the 1994 San Marino Grand Prix. Similarly, it was 18 years ago, yesterday, that Roland Ratzenberger died after crashing his Simtek-Ford during qualifying. RIP.