In 1998, Tony George made a deal to bring Formula One back to the United States. The last time F1 raced in the US was 1991. A new Indy-based road course using part of the oval track, and part of the infield was built in two years. The first United States Grand Prix held at the Speedway was in 2000. The 2001 event reported 185,000 fans were reported in attendance. The success was even more important with the race. The race was held on September 30, 2001. It was the largest international sporting event held in the United States after September 11, 2001 terrorist attacks.