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AUTO: SEP 18 IndyCar - GoPro Grand Prix of Sonoma

September 18, 2016: Marco Andretti in the Honda powered Andretti Autosport car #27 at turn 10 during warmup for the Verizon Indycar Series, GoPro Grand Prix of Sonoma held at Sonoma Raceway, CA. (Photo by Allan Hamilton/ Icon Sportswire)