1991 United States Grand Prix.
1991 United States Grand Prix.
Phoenix, Arizona, U.S
A.
8-10 March 1991.
Gerhard Berger (McLaren MP4/6 Honda), Nelson Piquet and Roberto Moreno (both Benetton B190B Ford's) and the rest of the field follow the leaders around early on.
Ref-91 USA 21.
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