Bobby Unser – F1 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 test Silverstone. Photo from the Collections of The Henry Ford 1968 September Monza. Photo from the Collections of The Henry Ford Bobby Unser, Mario Andretti, Grand Prix of Italy, Autodromo Nazionale Monza, 08 September 1968. American aces Mario Andretti and Bobby Unser participated in qualifying for the Italian Grand Prix in Monza, setting fast times, but were banned from participating in the race by the organizers, because they flew back accross the Atlantic to participate in another race, thus breaching an Italian stating that at least 24 housr between two race participations was mandatory. (Photo by Bernard Cahier/Getty Images) 1968 Italy GP. Copyright unknown via FB 1968 Italy GP. Photo from the Collections of The Henry Ford 1968 USA GP. Photo from the Collections of The Henry Ford 1968 USA GP. Photo from the Collections of The Henry Ford 1968 USA GP. Photo from the Collections of The Henry Ford about Bobby Unser