In 1953, all but one of the races counting towards the World Championship of Drivers were run under Formula 2 regulations, while the remaining one, the Indianapolis 500, was run under AAA Championship Car regulations. The 1953 championship was the first truly global World Championship of Drivers, with a championship event being staged outside of Europe or the United States for the first time. That race, the 1953 Argentine Grand Prix, was marred by an accident involving the Ferrari of Giuseppe Farina, which crashed into an unprotected crowd, killing nine spectators.