F1 legend Mario Andretti talks American drivers, constructors getting back onto grid ahead of Las Vegas GP - F1 drivers complain of marijuana smell at Las Vegas Grand Prix as stars fear drug tests - Christian Horner offers update on Geri Halliwell relationship after scandal rocked F1 - McLaren's Zak Brown talks mentality in tight race for F1 constructors' championship - F1 drivers criticize FIA and ask to be treated like adults over fines for swearing - F1 closer to approving expanded grid for General Motors entry initially started by Michael Andretti - F1 closer to approving Andretti bid for expanded grid with Michael Andretti now out of picture - F1 and ESPN open talks over next US media rights deal - Andretti could join F1 grid as GM team - F1 star claims he 'definitely deserves' to get 2025 Red Bull seat over Sergio Perez