On 1 May 1994, Brazilian Formula One driver Ayrton Senna was killed after his car crashed into a concrete barrier while he was leading the 1994 San Marino Grand Prix at the Imola Circuit in Italy.
Rubens Barrichello (pictured at the 1995 French Grand Prix) suffered a high-speed crash at the Variante Bassa chicane.
Roland Ratzenberger was killed after colliding with a concrete wall at the Villeneuve Curve. The picture is from earlier the same day.
Monument to Ayrton Senna, Melinda Garcia's work, installed at the entrance of the tunnel under Ibirapuera Park, São Paulo, Brazil
Roland Walter Ratzenberger was an Austrian racing driver, who competed in Formula One at three Grands Prix in 1994.
Death of Ayrton Senna
…at the Imola Circuit in Italy. Senna's death was the capstone to one of the darkest weekends in Formula One history. The previous day, Austrian driver Roland Ratzenberger died when his car crashed during qualifying rounds. Several other collisions took place that weekend, including a serious one involving Rubens Barrichello…
Ratzenberger at the 1994 Brazilian Grand Prix
As a tribute, Ratzenberger's name was left on the Toyota 94C-V which he intended to drive at Le Mans.