On this day in 1992, Ayrton Senna enjoyed a secret track day with Team Penske at Firebird Raceway, in Arizona.
The Brazilian had just wrapped up a disappointing F1 season in which he had only finished fourth in the championship. But it was Honda's decision to leave the sport that had Senna questioning his future.
Emerson Fittipaldi encouraged his good friend to sample his Penske IndyCar ride, which Senna readily accepted.
He ultimately didn't make the move to the US-based series, but the test yielded an impressive performance as he beat Fittipaldi's best lap time by half a second!
What could Senna accomplished had he raced in IndyCar? We'll never know...
