The four-time Indy car champion and 1978 F1 World Champion sent a message by Twitter:
“Aldo Andretti, my loving twin brother, my partner in crime and my faithful best friend every day of my life was called to heaven last night. Half of me went with him. There is no eloquence. I'm shaken to my core.”
Mario and Aldo Andretti at Indy in 1965, the year in which Mario won Rookie of the Year and finished third.