Gianmaria Bruni / Toni Vilander / of AF CORSE driving (71) LMGTE Pro Ferrari F458 Italia is followed by Romain Dumas / Neel Jani / Marc Lieb of Porsche Team driving (14) Porsche 919 Hybrid and Lucas Di Grassi / Loic Duval / Tom Kristensen of Audi Sport Team Joest driving (1) LMP1 - H Audi R18 e-tron quattro during FIA World Endurance Challenge free practice #1, Thursday, September 18, 2014 in Austin, Tex. (Mo Khursheed/TFV Media via AP Images)