Tempers boiled over at a press conference as Christian Horner shared his disgust with fellow Formula 1 team principal Zak Brown over accusations made in a letter to the FIA.
The McLaren chief wrote to the sport's governing body demanding harsh penalties for any team which breaches cost cap rules, in the wake of the accusation that Red Bull did exactly that last season. That letter was leaked, and was a source of contention as the two team bosses met the media on Saturday.
Horner and Brown were seated next to one another at a press conference in Austin which promised to produce fireworks. And that is exactly what happened, as the Red Bull boss struggled to contain his anger after being asked for his reaction to the letter.
