Highlights from the 2013 GoPro Grand Prix of Sonoma.Highlights from the first practice session for the IZOD IndyCar Series drivers for the 2013 GoPro Grand Prix of Sonoma. http://stream.nbcsports.com/liveextra/ - IZOD IndyCar Series LIVE Online http://www.indycar.com/Stats - Current Point Standings https://twitter.com/IndyCar - Follow on Twitter @IndyCar
