Claim: In the 1990 United States Grand Prix, five drivers including the winner Ayrton Senna (who later died in an accident leading the 1994 San Marino Grand Prix driving for Williams Racing) completed 79 laps, while only four drivers finished the 71 laps.
Evidence: Brazil Ayrton Senna 72 
It was the second to be held on the streets of Phoenix and ran over 72 laps of the 4 km-circuit.