The team principal of Cadillac's Formula 1 operation has revealed a powerful personal pledge from Mario Andretti during the team's journey to the grid. Andretti's promise — 'I will not let you down' — encapsulates the emotional weight behind the American team's entry into the sport. RaceFans reports on the behind-the-scenes story of how the racing legend's commitment helped drive the project forward through years of resistance from existing teams.